This software is a specialized MIDI sequencer for composing polymeter, which is music that uses multiple meters simultaneously. Each track has its own loop length, and when the lengths differ, the tracks "slip" (or shift phase) relative to each other. The resulting interference patterns are sufficiently intricate that variations similar to a live performer's embellishments can be generated algorithmically.

The Polymeter MIDI Sequencer evolved from software I developed in the 1990s in order to compose polymeter electronic dance music.

News

August 29, 2024

Version 1.0.16 adds duplicate note prevention. It's available for download; for details, check the release notes.

January 24, 2024

Version 1.0.15 adds a targets pane to the modulations bar.

December 25, 2023

Version 1.0.14 adds internal tracks for controlling sustain, sostenuto, and more.

September 20, 2023

Version 1.0.13 finally fully supports Unicode!

December 26, 2022

Version 1.0.12 lets you specify step duration as a fraction of a whole note instead of in ticks.

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