Algorithmic Arts

MicroTone v1.3

Micro Tone Tuning with MIDI Pitch Bend

MIDI MicroTone creates microtonal tunings that can be used with virtually any synthesizer or sound card. Only minimal support of the MIDI Pitch Bend specification is required of the hardware. If you can set the Pitch Bend range to +/- 1 semitone (just about any synth or card can do this), then you can work with microtonal music.

The program does not generate music, rather it generates a set of tables that will translate MIDI notes of an arbitrary tuning table (such as Just Intonation) into MIDI Notes and Pitch Bend values that will give the correct pitch for each scale step.


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It is very easy to create tuning tables by typing in the steps as ratios or cents values; by cutting and pasting the values into the input window, or by compiling a list of scales from the 2000+ set of free Scala tuning tables. Once a MicroTone table is created, it is available as a binary file that can be read by a MIDI composing program; and the fully descriptive tuning table can be saved as a text file.

Although MIDI MicroTone produces MIDI data that is not specific to any particular hardware or software, it was created primarily for use by Alogrithmic Arts's composing programs. The binary tables produced are in the standard Tuning Table format used by our composing programs, ArtWonk and MusicWonk. These have MicroTone-aware modules that handle the details automatically, so you only need to select the tuning table you want to use, then send the MIDI note values just as you would with standard MIDI Voice modules.

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You can try MicroTone free for 30 days. You get the full program with nothing disabled or omitted.

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