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polyend-tracker-re, image 1 from its README
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polyend-tracker-re

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Reverse engineering, documentation, and experimental firmware development for the original Polyend Tracker.

polyend-tracker-re is custom firmware for the Polyend Tracker, by @syamajala. Open source under Apache-2.0, latest release v2.2.3-ot1 (November 2026).

forPolyend Tracker·by@syamajala

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Download v2.2.3-ot1

PolyendTrackerOTv223.ptf· 2.1 MB· +1 file

Apache-2.0· syamajala/polyend-tracker-re·downloads come from the creator’s GitHub releases

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  1. v2.2.3-ot1OpenTracker v2.2.3-ot1Latest2 files

    The first OpenTracker fork release for the original Polyend Tracker, built on upstream 2.2.3. Stock projects still load and play; fork data lives in side files that stock firmware ignores.

    Install:

    1. Back up your SD card.
    2. Copy PolyendTrackerOTv223.ptf to /Firmware. Keep the name: the bootloader only accepts 24-character names.
    3. Go to Config > Firmware update and select it.
    4. Keep the stock PolyendTracker_1.9.2.ptf in /Firmware so you can go back.

    Guide: https://syamajala.github.io/polyend-tracker-re/

    Highlights

    • DX7 FM synth: a 6-operator engine as an instrument, with .syx bank loading.
    • Live resampling: record the master, a track, Line in or USB onto the bar while playing.
    • Performance mode:
      • 16 scenes on an A/B crossfader;
      • fader ranges that stage a fade column by column;
      • scene bank files you can export and import;
      • master DJ filter and tape stop;
      • MIDI CC columns for external synths.
    • Song mode: repeat counts, a Performance scene per slot, and fader ramps between scenes.
    • Multisample instruments from SFZ, and slices to pattern.
    • USB audio (Linux, Windows):
      • the Tracker is a USB sound card;
      • play the computer through it or sample it;
      • record the Tracker's master on the computer.
      • macOS isn't supported yet.
    • MIDI:
      • a per-synth CC chart and LFO for MIDI instruments;
      • shipped presets, attached as MidiPresets.zip (copy the MidiPresets folder to the card);
      • note names, piano pads and chord entry.

    Full feature list: the README's "What this fork adds". Known limitations: the README's "Known limitations".