TRANSFORM-A-TUNENatalie Brewer, Yuhan Chen, and Rupali Sarathy

TUNING AND TEMPERAMENT CONVERSION

The adjustment of one sound source, such as a voice or string, to produce a desired pitch in relation to a given pitch

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❖ An application that allows a user to select an input tune and convert it into a new melody based on one of six possible conversions➢ Negative Harmony

➢ Symmetric Harmony

➢ Reverse Pitches

➢ Randomize Pitches

➢ Double or Triple Intervals

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WHAT IS TRANSFORM-A-TUNE?

OUR PROCESS IS EASY 4

STEP 3

Listen to your brand new

melody!

STEP 1

Import any MIDI file of your choice.

STEP 2

Select your desired

conversion.

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CODING RESOURCES

Debugging:

TKINTER

▫ GUI interface for Python

▫ Uses grid layout and widgets

▫ Buttons for input, playback, and conversion

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HOW DOES IT WORK?

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Notes are associated with numbers in MIDI files.

NEGATIVE HARMONY▫ Reflects the pitches with

a mirror between E♭ and E, or A and B♭. It can be visualized by placing a mirror between these notes on a piano.

▫ This concept originated from Ernst Levy.

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NEGATIVE HARMONY ALGORITHM

SYMMETRIC HARMONY▫ An adjustment of the

negative harmony that transposes it down 3 semitones.

▫ The mirror is now placed A♭. ▫ After conversion, notes

played on white keys are still played on white keys and notes played on black keys are still played on black keys.

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SYMMETRIC HARMONY ALGORITHM

REVERSE PITCHES

▫ Reverses the order of pitches while keeping the same rhythm and tempo.

▫ The first pitch becomes the last and the last becomes the first and so on.

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REVERSE PITCHES ALGORITHM

RANDOMIZE PITCHES

▫ This conversion randomly scrambles the pitches in the melody while keeping the rhythm and tempo the same.

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RANDOMIZE PITCHES ALGORITHM

DOUBLE AND TRIPLE INTERVALS▫ This conversion doubles the

intervals between each note and the average note of the melody.

▫ All the notes are set on a whole note scale (or a diminished 7th chord)

▫ It widens the gap between the high pitches and low pitches.

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DOUBLE AND TRIPLE RELATIONSHIPS

Double Triple

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DOUBLE AND TRIPLE INTERVALS ALGORITHM

PARSING INPUT19

▫ Function called simple_parse_midi

▫ Returns a three part array

▫ First part is a list of MIDI notes

PRODUCING OUTPUT20

▫ Function called features_to_midi

▫ Accepts a three part array

▫ Produces a midi file

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ACKNOWLEDGMENTS▫ Professor Shlomo

Dubnov ▫ Professor Mauricio de

Oliveira▫ Gualter Moura▫ Our teacher assistants:

Jacob and Aren▫ Cluster 9!