digiplexer - sound processing_man_en_v1.x

DIGIPLEXER SOUND PROCESS

V.1.9.x USER MANUAL

Sound processing application for Digiplexer 2/4,

Digiplexer 246 and NEXT FM

powered

Date : 2009/12/03

audemat WordCast Systems Group

web: www.audemat.com - e-mail: [email protected]

Digiplexer Sound Process, user manual– 12/2009

Head Office : Parc d’activites Kennedy - 20, avenue Neil Armstrong – F-33700 Bordeaux-Merignac (France) Tel +33 (0)5 57 928 928 – Fax +33 (0)5 57 928 929 – [email protected] – www.audemat.com

TABLE OF CONTENTS

1. QUICK START ..................................................................................................................................... 4 1.1. Checking connections ................................................................................................................. 4 1.2. Connecting to the application ...................................................................................................... 4

1.2.1. From the remote application .................................................................................................. 4 1.2.2. From the front panel application ............................................................................................ 5

1.3. Setting Inputs .............................................................................................................................. 5 1.4. Setting the MPX output ............................................................................................................... 7 1.5. Selecting the preset .................................................................................................................... 7

2. LAUNCHING THE APPLICATION ...................................................................................................... 8 3. APPLICATION OVERVIEW – BASIC PRINCIPLES ......................................................................... 10

3.1. From the remote application ..................................................................................................... 10 3.1.1. Slider bars ............................................................................................................................ 10 3.1.2. Edit fields .............................................................................................................................. 10 3.1.3. Keyboard commands ........................................................................................................... 10

3.2. From the front panel application ................................................................................................ 11 4. MAIN SCREEN DESCRIPTION ......................................................................................................... 12 5. TOP PANEL ....................................................................................................................................... 13

5.1. CHANNEL ................................................................................................................................. 13 5.2. ON AIR ...................................................................................................................................... 13 5.3. Accessing the “ON AIR” Preset log ........................................................................................... 13 5.4. Undo/Redo ................................................................................................................................ 14 5.5. Compare “Work/Ref” preset ...................................................................................................... 14 5.6. On Air Preset History ................................................................................................................ 15 5.7. Preset management .................................................................................................................. 16

5.7.1. Save As ................................................................................................................................ 16 5.7.2. Preset ................................................................................................................................... 17 5.7.3. New ...................................................................................................................................... 18 5.7.4. Security ................................................................................................................................ 19

5.8. Setup ......................................................................................................................................... 21 5.8.1. General ................................................................................................................................ 21 5.8.2. Users .................................................................................................................................... 22 5.8.3. Preset Settings ..................................................................................................................... 25 5.8.4. Analog & Digital Input .......................................................................................................... 26 5.8.5. Analog & Digital Outputs ...................................................................................................... 27 5.8.6. Stereo Generator & MPX Output ......................................................................................... 28 5.8.7. MPX Power Control.............................................................................................................. 29 5.8.8. Upgrade ............................................................................................................................... 30 5.8.9. Backup / Restore .................................................................................................................. 30 5.8.10. Test Generator ..................................................................................................................... 31 5.8.11. Calibrate ............................................................................................................................... 31

6. CONFIGURABLE VU METER PANEL .............................................................................................. 32 6.1. Customize the configurable VU meter panel ............................................................................ 32

7. DIAGRAM PANEL ............................................................................................................................. 33 8. SOUND WORKSPACE ...................................................................................................................... 34

8.1. Groups of functions ................................................................................................................... 34 8.2. Easy or Full mode ..................................................................................................................... 34

9. PROCESSING FUNCTIONS’ DESCRIPTION ................................................................................... 35 9.1. WIDE BAND AGC ..................................................................................................................... 35

9.1.1. GATE THRES ...................................................................................................................... 35



9.1.2. DRIVE .................................................................................................................................. 35 9.1.3. ATTACK ............................................................................................................................... 35 9.1.4. RELEASE ............................................................................................................................. 35 9.1.5. AGC VU meter ..................................................................................................................... 36

9.2. TONE FX ................................................................................................................................... 36 9.2.1. Tone FX, Easy mode ........................................................................................................... 36 9.2.2. Tone FX, Full mode.............................................................................................................. 36

9.3. STEREO FX .............................................................................................................................. 37 9.3.1. WIDTH ................................................................................................................................. 37 9.3.2. LIMITER ............................................................................................................................... 37 9.3.3. The Stereo FX VU meter ..................................................................................................... 37

9.4. MULTI BAND PROCESS .......................................................................................................... 37 9.4.1. Multi Band Process, Easy mode .......................................................................................... 37 9.4.2. Multi Band Process, Full mode ............................................................................................ 38 9.4.3. GATE ................................................................................................................................... 38 9.4.4. DOWN EXP .......................................................................................................................... 38 9.4.5. FIDELITY ............................................................................................................................. 39 9.4.6. S.I.S – Sound Impact System .............................................................................................. 39 9.4.7. DRIVE .................................................................................................................................. 39 9.4.8. RATIO .................................................................................................................................. 39 9.4.9. Thresh .................................................................................................................................. 39 9.4.10. Attack ................................................................................................................................... 40 9.4.11. Release ................................................................................................................................ 40 9.4.12. The multi Band Process VU meters ..................................................................................... 41

9.5. MULTI BAND LIMITER ............................................................................................................. 41 9.5.1. Multi Band Limiter, Easy mode ............................................................................................ 41 9.5.2. Multi Band Limiter, Full mode .............................................................................................. 41 9.5.3. Drive ..................................................................................................................................... 41 9.5.4. Thresh .................................................................................................................................. 41 9.5.5. Mix ........................................................................................................................................ 41 9.5.6. The multi band Limiter VU meters ....................................................................................... 42

9.6. FINAL LIMITER ......................................................................................................................... 42 9.6.1. HF Limiter Drive ................................................................................................................... 42 9.6.2. HD Limiter Drive ................................................................................................................... 42 9.6.3. FM LIM DRIVE for the FM Limiter ........................................................................................ 42 9.6.4. VIRTUAL MPX LIMIT ........................................................................................................... 43

10. 1-BAND FACTORY PRESETS ........................................................................................................ 44 11. 2-BAND FACTORY PRESETS ........................................................................................................ 45

11.1. Wide Band presets .................................................................................................................... 45 11.2. 2 band presets list ..................................................................................................................... 46

12. 4-BAND FACTORY PRESETS ........................................................................................................ 47 12.1. Wide Band presets .................................................................................................................... 47 12.2. 4 band presets list ..................................................................................................................... 48



1. QUICK START 1. QUICK START

1.1. Checking connections Example of configuration:

1.2. Connecting to the application 1.2.1. From the remote application

a) From the Radio all in one application, click the “Process” button to launch the application, or from the front panel, touch the Sound4 button. You may also go to the ‘Sart’ button ‘Programs’ ‘Audemat’ ‘Digiplexer Sound Process’.

b) Click on the "New" button to create a new connection.

c) Enter connection information. If you do not know your unit’s IP address, check it on the front panel (see Quick Start notice). Default user name and password are: Admin / admin.

d) Click on the “OK” button to validate the new connection.

e) Click on the “Launch” button and wait for the application to connect to the unit.

Connect to transmitter

External audio cable: send an audio source on the analog or digital input.



1.2.2. From the front panel application 1.2.2. From the front panel application

You may not connect to the application via the front panel with a Digiplexer 2/4. You may not connect to the application via the front panel with a Digiplexer 2/4.

Touch the “Process” button and enter login and password. Default: Admin / admin. Touch the “Process” button and enter login and password. Default: Admin / admin.

When the cursor is in a text box, a keyboard automatically appears. Enter the value and touch ENTER to validate and hide the keyboard. More keyboards are available with the ‘123’ key for additional characters.

When the cursor is in a text box, a keyboard automatically appears. Enter the value and touch ENTER to validate and hide the keyboard. More keyboards are available with the ‘123’ key for additional characters.

1.3. Setting Inputs 1.3. Setting Inputs a) Click on the “Setup” button, and on "Inputs : Analog / Digital” to set inputs: a) Click on the “Setup” button, and on "Inputs : Analog / Digital” to set inputs:



Make sure the Backup mode is set to ‘Backup’ (1).Set input priority order first in the “Default input source” section (2). For instance: main source: Digital; 1st backup source: analogic; 2nd backup source: PCI.

Make sure the Backup mode is set to ‘Backup’ (1).Set input priority order first in the “Default input source” section (2). For instance: main source: Digital; 1st backup source: analogic; 2nd backup source: PCI.

Set levels for each input in the "Input levels" section (3). Once levels are roperly set, corresponding "Input meters” section (4) give maximum peaks of 0dBfs.

Set levels for each input in the "Input levels" section (3). Once levels are roperly set, corresponding "Input meters” section (4) give maximum peaks of 0dBfs.

WARNING: badly adjusted levels may lead to a degradation of the audio quality (saturation, loss of power…)

WARNING: badly adjusted levels may lead to a degradation of the audio quality (saturation, loss of power…)

The input setting window may be closed. The input setting window may be closed.

In the left panel, check that inputs have been set properly:

In the left panel, check that inputs have been set properly:

The arrow indicates which input is activated, ‘OK’ means a signal is detected.

2

3

4

1



1.4. Setting the MPX output .4. Setting the MPX output Click on “St gene / MPX output” from the

“Setup” window. Click on “St gene / MPX output” from the

“Setup” window.

In the "General Settings” section (1), set the pre-emphasis according to the country.

In the "General Settings” section (1), set the pre-emphasis according to the country.

In the “Levels” section (2), set the output levels.

In the “Levels” section (2), set the output levels.

Close all setup windows. Close all setup windows.

1.5. Selecting the preset 1.5. Selecting the preset Click on the “Preset” button. Click on the “Preset” button.

Double-click on a preset from the list to select it.

You are On Air!

1

2



2. LAUNCHING THE APPLICATION 2. LAUNCHING THE APPLICATION

These procedures are only available from the remote application.

From the Radio all in one application, click “Process”:

A tool bar will let you do the following:

Launch the connection.

Create a new connection.

Edit an existing connection.

Delete an existing connection.

Display connections in list view or icon view.

Sort connections by name, city or date.

Access 3 additional functions:

Delete all existing connections.

Import connection parameters saved in an xml file.

Export connection parameters in an xml file.



reate a new connection:

reate a new connection:

CC

Enter the Digiplexer’s IP address.

nd password will be used utomatically; a double click on the

If AutoConnect = ‘Yes’, user nameaaconnection line or a click on the “Launch” button will launch the connection.

If AutoConnect = ‘No’, a login window will be displayed first.

Enter the login and password



3. APPLICATION OVERVIEW – BASIC PRINCIPLES

It is important to properly understand the slider bars working principle in order to maximize their efficiency and better utilize your equipment.

The application sliders are virtual potentiometers that you will use to tune levels and frequencies. Their range appears in blue and an orange line shows the set value. The numerical value is displayed on the right of the bar.

3.1. From the remote application 3.1.1. Slider bars

There are three methods to change a value:

Click and drag the orange bar to the left (for a lower value) or to the right (for a higher value).

Position the mouse cursor on the bar and scroll the mouse wheel towards the top (for a higher value) or the bottom (for a lower value).

Position the mouse cursor on the bar and use the keyboard “Up” arrow (for a higher value) and “Down” arrow (for a lower value) keys, or “Page Up” and “Page-Down” for larger increments.

The slider bar will blink after being changed so it is easy to see what modifications have just been made.

A small switch is present on most slider bars: functions can be activated or deactivated according to your needs. When the function is deactivated the entire bar will be grey.

switch

Activated function

Deactivated function

3.1.2. Edit fields

The value displayed to the right of the bars can also be modified: click on the value, it will be

highlighted and you can then enter a new value with the keyboard. Press "Enter" to confirm the new setting. The value remains highlighted should you need to modify it again. Press "Enter" a second time to exit the Edit mode.

The background color of text fields is gray until modified. It then becomes orange so it is easy to see what modifications have been made. It will remain orange until the preset has been saved. It is therefore easy to view at a glance all of the new changes.

3.1.3. Keyboard commands

Command keyboard commands have been implemented in the Sound 4 application. The following commands are available:

To open a list of presets = Ctrl+O

To save the current preset = Ctrl+S

To undo a modification = Ctrl+Z

To restore a modification previously undone = Ctrl+Shift+Z



3.2. From the front panel application 3.2. From the front panel application

The application is not available on the Digiplexer 2/4’s front panel. The application is not available on the Digiplexer 2/4’s front panel.

To modify a value, use the keypad that pops up when activating a text box. To modify a value, use the keypad that pops up when activating a text box.

Lower or raise the value in steps.

Lower or raise the value by one for whole numbers and by 0.1 for decimal values.

Validate the new value. The button then turns into a “Close” and allows you to mask the keypad.

Delete the value.

Cancel modifications and displays the last recorded value.



4. MAIN SCREEN DESCRIPTION

Sound workspace

Top panel VU meter panel

Diagram

panel



5. TOP PANEL

5.1. CHANNEL

Nowadays, broadcasters often work with more than one radio program. Therefore, they use several signal processors. It is then crucial to know which processor is being accessed so as to avoid errors. That is what the editable field “Channel” is for. Changes can be done from the SETUP window (see section 4.7).

5.2. ON AIR

It is the current preset. When the user has made changes the phrase “not saved” will be displayed in the text zone until the changes have been saved.

5.3. Accessing the “ON AIR” Preset log

This button can be found to the right of the “On Air” display. Click on it to open the following window that will give you access to the preset information and edit log:

In the Preset Log section, the user may see and add information about the preset so as to better follow its evolutions. On the lower section, information about the preset is displayed:

Creation date

Factory preset

Main active input

High band filter setting

Band separation frequency

Stereo link setting

Available processing functions and their on/off state.



5.4. Undo/Redo

This button can be found to the right of the "Log" button. The middle button opens up the “Undo/Redo” window. This feature is unique to our processor. With your application, you will be able to undo or redo all changes and therefore go back to your original settings as you try new ones.

In the top section, all changes may be viewed. Click on “UNDO”, the line will then disappear from the top section and appear in the lower section. The "REDO" will do exactly the opposite. Note that those actions can be done without opening the window, simply using the keyboard shortcuts: Ctrl+Z (Undo) and Ctrl+Shift+Z (Redo).

The right and left arrows are also shortcut to undo/redo.

5.5. Compare “Work/Ref” preset

This button can be found to the right of the "Undo/Redo" button. It will compare the “Work” preset (the current preset) with a reference preset previously set by the user. Click on the button to switch from one to the other.

Warning: when the reference preset is displayed, no changes are possible. Every slider bar is grayed out. The word “reference” is also displayed next to the On Air preset name.

…. …

To set the reference, click on the small plus on the Work/Ref button, a list of preset is displayed; double-click on the preset you want as a reference.

Note: the icon appears in the preset list next to the reference preset.



5.6. On Air Preset History

This button can be found to the right of the "Work/Ref" button. It opens up the Preset history window. This is another major innovation. Here, the user may know at any time where the preset comes from, i.e. which factory or user preset is being used. Better yet, each time the preset is modified, the previous version is kept in the ‘history’, and may be reused days or months later.

In the "On Air Preset History" window, every preset that has been used has been saved. Double-click on one, and it will become the current preset.



5.7. Preset management 5.7. Preset management

This buttons can be found to the right of the “Histo” button. They correspond to the following commands:

Save the On Air preset

Save As the On Air preset with a new name

Load a user preset

New, create a new preset based on a Factory preset

5.7.1. Save As

Click on this section to enter the new name for the preset.



5.7.2. Preset

Load an On Air preset with this command: double-click on the preset you wish to select.

Three icons indicate the following information:

User preset icon

This icon shows the current On Air preset

This icon shows which preset is set as a reference (see section 4.6).

On the top right, four buttons correspond to the following commands:

Rename a preset

Delete a preset

Import a preset from your computer to the processor.

Export a preset from the processor’s internal memory to your hard drive.

Security allows you to manage preset security, see section 5.7.4.

"Save", "Save as” and "New" commands are also available here.



5.7.3. New 5.7.3. New

To create a new User preset based on a Factory preset, select a preset, rename it if necessary and click on OK. The new preset is now On Air, and can be found in a list of User presets that can be accessed with the “PRESET” button.

Click on this section to enter the name for the new preset.



5.7.4. Security

Presets may be password protected.

Set allows you to set the password.

Lock / Unlock to enable/disable the protection. The password is required to do so.

Clear to delete the password. The password is required to do so.

On the right of each preset alock symbol gives the protection status:

: no protection.

: a password has been set, protection is disabled.

: a password has been set, protection is enabled.

In the Preset auto lock section you can automatically lock the protected presets after a user-set delay of inactivity.



When a protected preset is on air, the workspace is locked and parameters are not visible. ted preset is on air, the workspace is locked and parameters are not visible.

To temporarily disable the protection, click the lock next to name of the preset and enter the password.

Once the preset is unlocked it will automatically lock again after a delay of inactivity (see previous page “Preset auto lock”).



5.8. Setup 5.8. Setup

This button can be found to the right of the preset buttons. You may then access:

Settings for:

General parameters

Users

Preset Settings

Input : Analog & Digital

Output : Analog & Digital

Stereo Generator & MPX Output

MPX Power Control

Advanced set up for:

Upgrades and License management

Backup and Restore

Test Generator

Calibration

To go back to the Setup main menu page, use the button.

5.8.1. General

Set a name for your processor. Click on the name to change it.

The display functions make it possible to:

• Set the refresh rate for the vumeters in number of times per second. Only increase this value is your connection allows it. In case of low bandwidth, decrease the value.

• Display all sub groups in a window at the same time.

• Set the height for the slider bars, and space between slider bars in the sound work space.

The Application auto exit function disconnects the user after a delay of inactivity.

The Preset security function automatically locks protected presets, see section 5.7.4.

The Process autolock automatically locks the user interface after a delay of inactivity so as to avoid unintentional changes. A simple dialog box gives the user the option to unlock.



5.8.2. Users

User management can be done intuitively, but the security process is very complex so as to satisfy every user’s and broadcaster’s needs.

What follow is an explanation on how the security works with the sound processing software…

5.8.2.1 Security overview Three security levels are available:

• « Super Admin » • « User Admin » and « User » • « Broadcaster Admin » and « Broadcaster »

5.8.2.2 The “Super Admin” account As you may have guessed, with this account, you can do everything. If there is only one user for the system, use this account and forget about the other ones.

IMPORTANT > When first installing the unit, use default login and password:

• login : Admin (cannot be modified, it is THE Super Admin login) • Password : admin (can be modified)

With a “Super Admin” account, you can:

Have simple access (remote control to set the processor) Create “User Admin” and “Broadcaster Admin” accounts Delete “User Admin” and “Broadcaster Admin” accounts



With a “Super Admin” account, you cannot:

Set the processor if a “Broadcaster Admin” account exists.

If you wish to manage access and give users specific rights, you will need to create one “User Admin” account and several “User” accounts.

5.8.2.3 The “User Admin” account It needs to be created by the “Super Admin”…

With a “User Admin” account, you can:

Create User accounts Have simple access (remote control to set the processor)

With a “User Admin” account, you cannot:

Delete your own account Create a “Broadcaster Admin” account Access transmission settings (TX level, RDS level…) if a “Broadcaster Admin” account

exists.

The “User Admin” account can only be deleted by the “Super Admin” account.

5.8.2.4 The “User” account It needs to be created by the “User Admin”…

With a “User” account, you can:

Have simple access (remote control to set the processor)

With a “User” account, you cannot:

Delete any account Access transmission settings (TX level, RDS level…) if a “Broadcaster Admin” account

exists

5.8.2.5 The “Broadcaster Admin” account The “Broadcaster Admin” and “Broadcaster” accounts are specifically for broadcasters who offer Sound4 processors to their clients. It is then the broadcaster who manages the processor.

For this type of application, the broadcaster is the only user with rights to the transmission settings (TX level, RDS level…), while clients have access to sound processing settings.

User Admin and Users will always be able to view transmission settings, but will not be able to modify them.

However, “Super Admin”, “Broadcaster Admin” and “Broadcaster” will not even be able to view sound processing settings, only “User Admin” and “Users” will be able to.



It needs to be created by the “Super Admin”…

With a “Broadcaster Admin” account, you can:

Create “Broadcaster” accounts Access transmission settings Import and modify a client preset

With a “Broadcaster Admin” account, you cannot:

Delete your own account View sound processing settings (reserved for the client)

The “Broadcaster Admin” account can only be deleted by the “Super Admin” account.

5.8.2.6 The “Broadcaster” account It needs to be created by the “Broadcaster Admin”…

With a “Broadcaster” account, you can:

Access transmission settings Import and modify a client preset

With a “Broadcaster” account, you cannot:

Delete your own account View sound processing settings (reserved for the client)



5.8.3. Preset Settings 5.8.3. Preset Settings

Please note that the following parameters are applicable to the current preset. Please note that the following parameters are applicable to the current preset.

With Stereo Link, check level differences between left and right, and restore them at the output. This is particularly interesting for jazz and classical programs, not so much for pop/rock programs, as it may lead to a sound power loss.

Band crossover frequency definition (not available in Wide band). In 2-band 470Hz is interesting because it fits most programs. For a warmer sound, it is better to choose a frequency around 200Hz. In 4-band, additional configuration are available.

The Digiplexer 246 is equipped with 3 inputs:

• 1 analog input

• 1 digital (AES/EBU) input

• 1 PCI input (internal audio backup)

For audio security, one source can be set as main input (main source) and both remaining sources as emergency inputs (1st Backup and 2nd backup). That way, when there is no modulation on the main input, the processor will automatically switch to the other inputs according to the priority settings.

For more flexibility, you can set the priority order two different ways:

• Either the same order should always be used (Default). In that case, click on "Analog & Digital Input" (see next section).

• Or a different order should be used depending on the audio presets. Click on Default to change to a different value. It will be set for the current preset.

Delays between input and output; it represents the time required for processing the signal.

A High-Pass filter is present at the processor input. With it, it is possible to minimize the following:

• The rumble, often present in infra-low and on microphone sources without bass frequencies limitations.

• Loudness loss due to spectrum occupation by infra-low that can only be heard on very large speakers.

The High-pass filter can be set between 1 and 200Hz according to your needs.



5.8.4. Analog & Digital Input 5.8.4. Analog & Digital Input

Default input source, as described in the previous section: set input order here. You may also set a fade in/fade out time when switching from one input to another.

Levels can be set for each input. For the analog input, 2 input level ranges are available, +12 or +24 dBu, set with jumpers directly on the Sound4 board.

With the Backup option, the unit will automatically switch input sources using one of two modes:

• Backup: In this case, the switch occurs as soon as the Main Source no longer provides modulation. In this mode, both of the other inputs serve as backups for the main one.

• Priority: The switch occurs as soon as modulation is detected on either the 1st or 2nd backup input.

Threshold: switchover will occur when this detection level is reached.

Time to Wake-up: delay before Backup or Priority mode is activated.

Time to Fall Asleep: delay before switching back to Main source.

With the Right Trim function, adjust the level of the right channel to compensate potential losses.

Should there be a loss of signal either on the left or the right channel, the remaining signal can be sent on both right and left channel.



5.8.5. Analog & Digital Outputs 5.8.5. Analog & Digital Outputs

With Analog gain, set the analog output level gain (two level ranges are available: +12 or +24 dBu, set at the factory with jumper directly on the Sound4 board).

The Digiplexers’ analog output can be assigned to one of the following:

• FM: processed audio for FM.

• HD: processed audio for digital formats (HD, DAB, DMB, Webstream…)

• Analog replicate: the analog input source will be replicated on the analog output.

• Digital replicate: the digital input source will be converted and replicated on the analog output.

• PCI replicate: the audio source from the PCI driver will be replicated on the analog output.

• AGC In replicate: regardless of which input is used, the AGC input audio source will be replicated on the analog output.

Auto FM De-Emphasis: automatic de-emphasis when using FM output.

The digital output features are similar to those of the analog output: we have access to Digital Gain , application (FM / HD / Analog replicate…..) as well as automatic de-emphasis. If AES/EBU is being used, there are 3 additional parameters:

• Default Sample Rate: default output sampling frequency (32 to 192KHz)

• AES In Synch: when this mode is selected, output sampling frequency will be identical to processor input frequency.

• External Synch: with this mode, synchronize the processor with an external AES/EBU clock.

The Dithering function makes it possible to change the resolution at the AES output (between 18 and 24 bits).

On the Phone output, set the gain if necessary and set the source and de-emphasis as with the analog output.



5.8.6. Stereo Generator & MPX Output 5.8.6. Stereo Generator & MPX Output

In General Settings, you will find the basic stereo encoder functions:

• Stereo mode: to set the encoder in Stereo, Mono, R>L or L>R mode.

• Pre-Emphasis: to set the pre-emphasis type (75µs, 50µs or None). The latter is only applicable for the FM output.

• Freq for FM Filter: by default, the FM filter frequency is set at 15 kHz; it is possible, however, to go up to 17 kHz so as to improve the high frequency sound. Caution - this manipulation can only apply if no RDS program is broadcast, to ensure the signal is free of disturbance.

Both TX outputs on the Digiplexer 246 carry a multiplex signal by default. With TX Output assignation, the user can set which signal will be present on each BNC (TX1 and TX2). Two choices are available:

• MPX (normal composite signal)

• 19kHz (pilot signal for external encoders synchronization.

With Levels, set MPX signal parameters:

• TX1 and TX2 gain for MPX signal output levels. If a RF block is present in the unit, the level for TX1 must be 12 dBu.

• Master Level for max low frequency deviation

• 19Khz level for the pilot deviation in kHz.



5.8.7. MPX Power Control 5.8.7. MPX Power Control

The unit is equipped with a Limiter and MPX power controller conforming to the ITU-R 412 standard. MPX power regulation is done within the signal processing so as to ensure perfect control and stability, with no audible side effects. Unlike with our competitors’ products, no regulation is done at the TX output, thus ensuring maximum perception od loudness and power while staying within ± 75 kHz.

MPX Power Control settings:

• Mode: ON/OFF to activate the MPX power controller.

• Max MPX Power (dBr): set the max value for MPX power.

• Calibration Pwr corr: MPX controller calibration adjustment.

• Limit users to Max Target : prevent users from setting the max value for the MPX power above the target range, for instance, by a Broadcaster for a user.

MPX controller VU meters:

• Predictive Power: instant power display.

• Normal Power: real MPX power display generated by the processor.

• Integration Time: power measurement integration time display. The standard requires a 60 second sample for the power measurement to be valid. That is why every time the “Max MPX Power” value is modified, the integration time is reset. It is therefore necessary to wait 60s for the “Real MPX Power” to be correct.

• Power Reduction: MPX power regulation display. In the above example, the MPX power controller reduces the power by -1.5 dB so as to conform to the 3 dBr Max set by the user. Note that the measured output value is 2.99 dBr.

Caution:

• When using the MPX power regulator, always display the Normal Power and Power reduction VU meters in the VU meters panel (see section 5), so as to view the information at all times.

• A high Power reduction (>5db max) is meaningless. If it is high, lower it in the FM Lim Drive found in the “Final Limiter” group.

• Do not activate the MPX power reduction if no standard requires you to do it, it could have a negative impact on the desired sound level.



5.8.8. Upgrade 5.8.8. Upgrade

5.8.9. Backup / Restore

To download processor upgrades, and activate licenses.

Use the buttons in the tool bar to:

Backup your processor data and save it into a file on your PC or on the network. The format of the file is a proprietary format and can be used to later restore the unit’s configuration or apply the same configuration to a different unit.

Restore your data and load a previously saved file.

Restore to factory and erase all the changes you may have done.



5.8.10. Test Generator 5.8.10. Test Generator

5.8.11. Calibrate

The unit has been calibrated in the factory. However, should a field calibration be necessary, carefully follow the directions on the screen.

The Test Generator is used to calibrate the equipment.

Note: if it is ‘ON’, it will be activated, and all other processor input audio sources will be deactivated.



6. CONFIGURABLE VU METER PANEL 6. CONFIGURABLE VU METER PANEL

To answer everybody’s needs, a configurable VU meter panel is available. You will be able to set the number of columns and lines, and positon them wherever you wish. See examples below:

Example 1:

Example 2:

Example 3:

6.1. Customize the configurable VU meter panel To customize the VU meter panel, click on an existing VU meter to display the following menu:

When Custom1 is selected, panel customization will be memorized under this name. You will then be able to retrieve it by clicking on a VU meter and selecting Custom1. Up to five settings can be saved (Custom1 to 5).

Select the VU meter type

Advanced customization tools

User configurations

Default configuration

Select the unit



7. DIAGRAM PANEL 7. DIAGRAM PANEL

The Diagram panel displays the following information:

Input state (if audio is present, backup status…)

Processing functions diagram

Output configuration (HD, FM…)

Input state, possible state definitions:

• OK: input receiving audio

• fault: input no longer receiving audio

• 1st Back: input set as 1st backup source.

• 2nd Back: input set as 2nd backup source.

The triangle on the left shows the input that is currently being used (On this example, the digital input, which is also the 1st backup, indicating there is no modulation on the analog input).

Processing functions diagram

Output assignment:

As discussed in section 4.7.5, the Digiplexer 246’s outputs can be attributed whichever way you wish. In our example, the analog output replicates the analog input signal, the digital output carries an HD signal, the TX1 output carries the MPX signal and the TX2 output carries the 19kHz.pilot signal.

Click on the "+" on the right of the slider bar to assign an output as "monitor". You may choose among analog, digital and headset outputs. Once configured, the output level can be set directly with the slider bar.

In this section, you can also compare any processor input with the output. For example, simply click on "Input” or “FM”, the matching button becomes orange.

Finally, you may also select the FM or HD output mode, and the input (analog, digital or input for the AGC input signal) when clicking on the “+“ on either button

In case of overload of one of the inputs or outputs, a red insert indicates the source allowing the user to adjust the target I/O as needed.



8. SOUND WORKSPACE

This is the heart of the sound processor. The sound workspace encompasses all the functions that will allow you to customize your sound. It is organized as follows:

8.1. Groups of functions

…

Each group of function can be expanded to give full access to its features or collapsed to gain space.

Click on the button on the right of the bar to expand or collapse the group.

When the function can be bypassed, the button appears on the left side of the bar. When bypass mode is on, the function title is grayed out and the Bypass button blinks.

8.2. Easy or Full mode We are dealing here with a user-friendly processor. An access level can be set for some of the functions:

The Easy mode simplifies the function as much as possible

The Full mode, very complete, for as much depth as possible for the function.

Functions having both Easy and Full levels are easily recognizable as an or button is in the title bar. The following example shows the 2 Band process function in both modes:

Easy mode for 2 Band process:

Full mode for 2 Band process:



9. PROCESSING FUNCTIONS’ DESCRIPTION

Depending on the version of your processor (1-band, 2-band or 4 band) some processing functions may not be available.

9.1. WIDE BAND AGC

The first processing stage is the Wide Band AGC. It is an automatic gain control that works across a large band of frequencies. Its primary goal is to normalize the differences in audio levels applied at processor input.

This AGC has a specifically developed predictive algorithm. It can correct strong sound variations without any pumping effects. Compared to other processors, the ease of control on of the AGC is without equal.

9.1.1. GATE THRES

This threshold will freeze the processor’s operation when the audio drops below this user-set limit. This function limits floor noise when the signal is too low. When the Gate Threshold is activated, the signal is below the set limit, will light up just above the AGC VU meter.

9.1.2. DRIVE

It will increase or decrease gain at the AGC input. Increasing the drive to the AGC operated gain reduction, thus making up for very low levels. Inversely, very low drive will prevent low level corrections at the processor input.

9.1.3. ATTACK

Adjust, in dB per second, to set the AGC reactivity speed to a volume increase.

9.1.4. RELEASE

Adjust, in dB per second, to set the AGC correction speed. As mentioned before, the AGC is extremely powerful, it is therefore not necessary to use high Release speeds. We recommend using between 1 and 1.5 for classical music and 2 for other programs.



9.1.5. AGC VU meter 9.1.5. AGC VU meter

It measures attenuation, so it moves from right to left. As with every other VU meter, there are 3 indications:

The orange line indicates the ‘Max atten Hold’, the max attenuation reached within the last 2 seconds.

The blue line indicates dynamically the attenuation.

The value on the right of the VU meter indicates the max attenuation reached within the last 2 seconds.

9.2. TONE FX The Tone FX will color the sound before dynamic processing. In order to do so, there are 2 types of processing functions:

A 4 band parametric equalizer.

An effect system reinforcing low and high frequencies.

Both functions offer completely different results; they are both here so as to satisfy every user.

9.2.1. Tone FX, Easy mode

In Easy mode, the 4 parametric equalizers’ functions are stripped down as much as possible: the only available adjustment is the gain. For the Bass FX and the Treble FX, only one effect variable is available.

9.2.2. Tone FX, Full mode

In Full mode, all the parameters of the parametric equalizer are available:

A spectral display illustrates the general correction applied by the parametric equalizer in real time.

Parametric band center frequency

Applied filter quality – ‘width’ of the parametric band

Gain of the parametric band



9.3. STEREO FX

Your Radio all in one unit is equipped with a real stereo enhancer, 100% mono compatible. Its role is to improve the existing stereo image, it will not however, create stereo from mono sources.

In addition to enhancing the stereo image, it can work to control the energy transmitted by the stereo subcarrier at 38 kHz with a stereo image limiter. This unique capability minimizes the problems usually encountered with standard stereo enhancements. The reception stability in environments affected by multiple trajectories (multipath) is therefore optimized.

9.3.1. WIDTH

Set the stereo enhancement rate. Usually, it is sufficient to set it between 20 and 40%.

9.3.2. LIMITER

Set the stereo image reduction percentage compared with a 100% max rate. If using the stereo enhancer, we recommend you use a percentage between 10 and 15%.

9.3.3. The Stereo FX VU meter

The FX VU meter shows the enhancement rate as generated by the processor. It moves from the inside towards the outside.

The LIM VU meter shows the limitation percentage on the subcarrier at 38 kHz.

9.4. MULTI BAND PROCESS The multi Band Process is the heart of the dynamic processing of your Radio all in one unit. A unique algorithm controls the gain in each band so as to render perfect sound stability. The color is controlled by the Fidelity parameter; it is thus possible to have either a pure or a colorful sound texture.

The revolutionary S.I.S (Sound Impact System) algorithm will keep the original authenticity of sound attacks (peaks).

The multi Band Process is extremely powerful, that is why is it not always necessary to use the AGC stage, as it can absorb important sound variations.

9.4.1. Multi Band Process, Easy mode



9.4.2. Multi Band Process, Full mode 9.4.2. Multi Band Process, Full mode

In Full mode, it is possible to have different settings for each band. Bands are always organized in the following fashion: bass at the bottom and higher frequencies on top:

It is therefore possible to exercise control separately on each band or proportionally on all bands at once with the "All” slider bar:

9.4.3. GATE

This threshold will freeze the operation for each band when the audio drops below this user-set limit. This function limits floor noise when the signal is too low.

A blue line in the Input VU meter allows the user to view the set threshold. When the Gate Threshold is activated, the signal is below the set limit, will light up just above the multi-band VU meter if one band at least is frozen. An indicator turns blue for each band in the slider.

9.4.4. DOWN EXP

It only works when the corresponding band is frozen by the Gate function. It then holds the attenuation on the user-set value.

It then automatically returns to the configured value according to attack and release time (see section 9.4.10 and 9.4.11).

Working with Gate + Down Exp is especially useful in case of noisy sources such as microphones.

High Band (HI) Bass Band (LO)

Set separately Set separately

Proportional setting with

the ‘All’ slider bar











9.4.5. FIDELITY

This function controls the spectral balance between bands. For instance, if Fidelity = 0, both bands work independently and the sound is more colorful. If Fidelity = 100, bands are linked to the spectral distribution at the input, and the sound is purer.

9.4.6. S.I.S – Sound Impact System

As mentioned above, the Sound Impact System maintains the authenticity of the original sound attacks. A blue LED lights up when it is in action. Note that you need to stay alert when using the S.I.S with high values (greater than 6) because it will increase significantly the average power of the sound. You may then need to lower the Band Limiter or Final limiter drive.

9.4.7. DRIVE

Its goal is to create more or less gain at the input of the band. Increasing the drive leads to a reduction in the gain created by the band process, which can make up for very low levels. Inversely, a very low drive will prevent low level corrections. As mentioned above, the band process power allows for gain control within the bands without the use of the wide band AGC. If you choose this option, we recommend you “push” the drive to the bands so the reduction is sufficient to correct low levels.

9.4.8. RATIO

With the advanced algorithm of the 2 Band Process you may have a very high ratio without any compressed sound effect: that is how this stage can make up for very large level differences.

9.4.9. Thresh

The Threshold sets working limits for each band. It can also move bands from background to foreground and vice versa.



9.4.10. Attack

Adjust in dB per second to set the processors’ reaction speed for each band. The lower the value, the slower the processor reacts; the higher the value, the faster the processor reacts, thus controlling rapid variations.

9.4.11. Release

Release is often associated with density. Indeed, the higher the release, the higher the spectrum density within the band. Once more, we remind you that the Band processor is very powerful; it is therefore not necessary to set a high release in order to get high density levels.



9.4.12. The multi Band Process VU meters

The Input VU meter shows the level at band input, and as always with the application, the peak Hold displays the max value within the last two seconds.

The Attenuation VU meter shows the effective reduction on each band.

9.5. MULTI BAND LIMITER The 2 Band Limiter’s main goal is to prepare for the final limiter, using a powerful predictive algorithm. It has been stripped down so as not to complicate things with useless parameters.

9.5.1. Multi Band Limiter, Easy mode

9.5.2. Multi Band Limiter, Full mode

9.5.3. Drive

As always, its goal is to create more or less gain at the 2 band limiter input.

9.5.4. Thresh

The Threshold sets the limit for each limiter band.

9.5.5. Mix

It is possible here to dose the output level for each band so as to obtain the best sound balance.



9.5.6. The multi band Limiter VU meters

As always, you will find VU meters to the left of the parameters. These VU meters show the gain reduction for each band.

9.6. FINAL LIMITER

Today, most FM processors offer a MPX limiter system, sometimes called a composite clipper. This process is often presented as a feature to use gently so as not to risk MPX spectrum deterioration or overmodulation. However as each station tries to “outloud” all the others, it is frequently used. Yet, the following unwanted effects may occur:

1. Degraded reception in areas affected by multiple signal paths. 2. Pollution of the stereo spectrum (L-R) with harmonics from the mono spectrum (L+R): it

amounts to mixing bits of sound information with no relation to one another. 3. Difficulty controlling the maximum noise level - for some sound sources, results will be

decent, but it will be mediocre for others. 4. Bury the 19kHz pilot in noise …

Some processors are equipped with a 19 kHz filter system that is supposed to protect the pilot. But the 3 other issues remain. It is therefore recommended to be vigilant when using an MPX limiter because the designs and spectral pollutions differ greatly from one processor to the next.

9.6.1. HF Limiter Drive

The HF Drive controls the level into the HF limiter so as to increase or decrease the amount of high frequencies to be processed.

9.6.2. HD Limiter Drive

The HD Limiter is specifically conceived for high quality digital applications (HD / DAB / DRM). It is a ‘Look-Ahead’ type limiter. Its delay can be adjusted. In this mode, outputs are not limited to 15 kHz.

Controls the gain at the HD limiter input.

9.6.3. FM LIM DRIVE for the FM Limiter

The FM Limiter is dedicated to FM applications. It is an extremely powerful clipper working at a sampling frequency that has never been reached before: 1.5 MHz!

Controls the gain at the FM limiter input. CAUTION: always be aware that increasing the FM limiter drive may lead to significant distortion.



Remember that the more you load the final limiter, the more you increase the multiplex power. When the MPX power control is activated, you must absolutely monitor its regulation level, or it might attenuate the MPX power level as you increase the limiter drive!

9.6.4. VIRTUAL MPX LIMIT

When designing the "15 kHz Filter / final clipper" section of the Radio all in one, a unique process has been developed to obtain the positive effects of the MPX limiter (loudness) without the bad side effects (uncontrolled noise levels). This complex and unique process acts directly on the audio signal.

The advantages of Virtual MPX Limiter are:

1. 100% control of level regardless of the source. 2. No random pollution in the stereo part from the mono part. 3. No overshoot 4. Loudness gain without destruction of the signal 5. Safeguard against multiple path issues 6. Loudness gain on all FM outputs (Analog, Digital and MPX) and not only on the MPX output

as is the case with every other processor. Can be used without any compromise…



10. 1-BAND FACTORY PRESETS

In addition to the list below, note that there is also a “Bypass” preset.

Wide band presets list

Indicator* Factory Preset Name Information

- WB – Original Digiplexer

This preset is fully compatible with FMX type Digiplexer. The user will only need to increase or decrease the AGC Wide Band release to match the reactivity speed as set on the old equipment. Setting the final limiter will be the last step to take for the levels to be 100% compatible.

- WB – Classical Preset to be used with classical programs.

- WB – Soft Process For a natural but flattering sound.

1 WB – All Programs All-around preset that can fit any purpose requiring wide band processing.

2 WB - Punchy This preset uses more the Final Limiter so as to offer a more powerful sound.

*Set reactivity or processing power, presets are ordered from 1 to 7 according to their application domain.




There are two types of factory presets:

WB presets (wide band)

2B presets (two bands)

Note that there is also a “Bypass” preset.

11.1. Wide Band presets These presets do not use the 2 band processor; therefore, they are based on AGC input and on limitations circuits. Why select a Wide Band preset when a 2 band structure is available?

It can be interesting for "purists” who do not wish to color their sound. The Wide Band mode can also be used to perform final processing in the chain when used with an in-studio 4 or 6 band Radio all in one.



- WB – Original Digiplexer

This preset is fully compatible with FMX type Digiplexer. The user will only need to increase or decrease the AGC Wide Band release to match the reactivity speed as set on the old equipment. Setting the final limiter will be the last step to take for the levels to be 100% compatible.

1 WB – Classical Preset to be used with classical programs.

2 WB – Soft Process For a natural but flattering sound.

3 WB – All Programs All-around preset that can fit any purpose requiring wide band processing.




11.2. 2 band presets list


2 2B – natural Though it operates in 2 bands, this preset gives a natural sound with a sound spectrum similar to the input source.

3 2B – Soft Process Perfect balance between low and high spectrum in a soft way. For stations wanting to stay low-key.

3 2B – All Programs With a 3 indicator, it has character, without overdoing it. All-around preset.

2 2B – Jazz Soft For purist jazz programs, this preset keeps the spectrum balance yet controls peak levels.

3 2B – Jazz This preset uses more depth in the 2-band structure. The result will be more colourful and flattering.

4 2B – Rock Powerful preset, perfect for rock / pop rock programs.

4 2B – AC Natural In between Rock and Hot, this preset is both powerful and natural.

5 2B – AC Strong sound power that keeps a rock tonality.

5 2B – Hot The 2B Hot brings a warm and colorful sound. The bass will be present and deep, the high part of the signal will be flattering.

6 2B – Urban The most powerful preset, usually for stations looking for significant sound density and a lot of MPX power and bass. It works for Top 40 type stations.





There are two types of factory presets:

WB presets (wide band)

4B presets (four bands)

Note that there is also a “Bypass” preset.

12.1. Wide Band presets These presets do not use the processor’s 4 bands; therefore, they are based on AGC input and on limitations circuits. Why select a Wide Band preset when a 4 band structure is available?

It can be interesting for "purists” who do not wish to color their sound. The Wide Band mode can also be used to finalize the chain when used with an in-studio 4 or 6 band Radio all in one.



1 WB – Wide Band Natural Preset with a natural sound

3 WB – Wide Band Hot For a natural but flattering sound.




12.2. 4 band presets list Indicator* Factory Preset Name Information

1 4B – Classical Soft Even though it uses the 4-band structure, this preset keeps the initial spectrum repartition

1 4B – Classical Mid Slightly more boosted than the “Classical Soft” preset

1 4B – Classical Processed For classical stations wanting to color and level broadcast music while keeping the spirit of a classical program.

2 4B – Natural Though it operates in 4 bands, this preset gives a natural sound with a sound spectrum similar to the input source.

3 4B – Natural Hot Slightly more colorful than the “Natural”.

4 4B – Natural Loud This preset will give a powerful sound without modifying the initial source mix.

2 4B – Jazz Soft For purist jazz programs, this preset keeps the spectrum balance yet controls peak levels.

3 4B – Jazz Hot This preset uses more depth in the 4-band structure. The result will be more colourful and flattering.

3 4B – All Programs With a 3 indicator, it has character, without overdoing it. All-around preset.

4 4B – All Programs Hot Slightly more colorful than the “All Programs” preset.

4 4B – Country Especially suited for country music, this preset offers a deep sound.

4 4B – Rock Powerful preset, perfect for rock / pop rock programs.

5 4B – Rock Hot More colorful than the “Rock” preset.

5 4B - AC Soft Strong sound power that keeps a rock tonality. This preset works with many commercial formats.

5 4B – AC More compressed version of the 4B – AC Soft preset, it bring strong multiplex power.

6 4B – CHR Very powerful preset for commercial stations, related to the “Urban” preset but more present in the medium-high and high signal

6 4B – Urban The most powerful preset, usually for stations looking for significant sound density and a lot of MPX power and bass. It works for Top 40 type stations.


digiplexer - sound processing_man_en_v1.x

Documents

parc dactivites kennedy

avenue neil armstrong

fmx type digiplexer

user manual 12 2009

digiplexer sound process

admin admin

strong sound power

sound impact system