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Last update: April 10, 2026

Tektracker

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Attrk is a MIDI sequencer program based on Billy Bigg's Tektracker. The original Tektracker was published under the terms of the GNU Public License (GPL) for open source software, which allows the source code to be distributed and modified, that is, improved, provided that the new source code is also made freely available for improvement. The Attrk program is a modification of the Tektracker under the privileges granted by the GPL.

Attrk uses the algorithm and visual design created by Billy Biggs, but the source code has been rewritten and many additional features added. Attrk is a separate effort from the original Tektracker.

The Tektracker is a software sequencer. The individual "tracks" are shown in vertical columns, side by side, and in which the notes and patterns in the same row are synchronized. The sequencer runs on your PC, and the MIDI commands are sent out through the PC MIDI adapter (usually the sound card) to your musical instrument synthesizer. Like most sequencers and drum machines, the tektracker was designed with two modes: a pattern mode for entering individual notes into each pattern, and a song mode for arranging patterns into a loop, or "song."

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