digital audio production munsang college information and communication technology s2
TRANSCRIPT
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Digital Audio Production
Munsang CollegeInformation and Communication TechnologyS2
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What is Digital Audio Processing?
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Audio Format
Uncompressed format WAV (Mainly for Windows Platform) AIFF (Mainly for Mac OS)
Compression format Lossy Format : mp3, wma, ra, aac, ac3, mp2 Lossless Format : wav, aiff, ogg, au, flac, ra,
wma
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Bit Rate
Number of bits that are conveyed or processed per unit of time Example for mp3 audio
96 kbit/s - FM quality 128 kbit/s - Standard Bitrate quality 192 kbit/s - Digital Audio Broadcasting quality 224-320 kbit/s - Near CD quality
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Sampling Rate
The sampling rate defines the number of samples per second taken from a continuous signal to make a discrete signal. 22,050 Hz - half the sampling rate of CD 44,100 Hz - CD, VCD, SVCD, MP3 48,000 Hz - tape recorder, video server 96,000 Hz - DVD, HD DVD, Blu-ray Disc
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Different types of Channel
1.0 Mono 2.0 Stereo 4.0 Quad 4.1 Surround 5.1 Surround 5.1 Side 7.1 Front 7.1 Surround…
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5.1 Surround
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7.1 Surround
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Applications???
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Input Process Output
Input Process Output
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Steps for editing audio file
1. Prepare for the source file Import from audio CD and convert to WAV Import from *.mp3 file and convert to WAV Recording directly
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Steps for editing audio file
2. Audio Editing Basic editing (Select, delete, copy and
insert) Volume control Fade in / Fade out Noise removal Silence Audio 、 Generate Silence Adjusting Pitch and Tempo Mixing
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Steps for editing audio file
3. Export / conversion Convert to mp3 format Record in Audio CD
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Audio Editing Software…
Audacity – recording and mixing (Free)
Logic Studio – Professional Music authoring (Mac)
WavePad – Easy ringtone editing
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Audacity – Download & Install
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Audacity – Learn & Practice
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Task
Produce a 30 second audio advertisement
About your favorite song. Submit both the project file & MP3 Deadline: before next lesson your files as
2XYY_audio.aup & 2XYY_audio.mp3
http://www.babble-on-recording.com/samples.html