Track Solo for Elektron Octatrack

Momentary solo: hold a track for 0.5 seconds, tap others to join, then release to restore.

Module version 0.2.5-experimental. Base firmware: 1.40C.

About this module

A session-only audition while editing. The held anchor is hidden from stock shortcuts; underlying mute and solo changes apply when the audition ends.

• Hold one TRACK button for 0.5 seconds to start a temporary solo.
• Toggle other audio tracks into the group with one press.
• Release the anchor to return to the underlying mute and solo state.

How to use it

1. TRACK SOLO starts at HOLD; turn it OFF under PROJECT > CONTROL > SEQUENCER for the session.
2. Hold T2 alone for 0.5 seconds, then press T3 to add or remove it.
3. Release T2 to end the temporary solo.

Compatibility notes

• USB only: needs the Modwerk base for its key, tick and encoder events and its SEQUENCER row, so card firmware cannot include it.
• Functional hardware report on package 50f64eb6 on beta base 72defb09, mostly alone and once beside Play Modes. Not tested on hardware: other modules, MKI, all eight anchors, external MIDI, arranger rows, Pickup recording, K09 modifier orderings, self-test. See TESTING.md.
• TRACK SOLO is HOLD on startup and after package replacement; set it to OFF for the session to restore stock long TRACK presses. The setting and solo groups are not saved.
• MIDI mode is excluded. When T8 is master, include it with the source tracks in the temporary group; T8 alone has no source audio.
• Mute Modes is optional. Paired emulator audio passed for OT, OTFX, OTFX-T and DT-T on the 0.2.2 package; physical Mute Modes behavior is untested.
• USB settings use the existing shared row table; native card settings integration is pending.
• With Play Modes: whichever TRACK gesture starts first wins. Press UP or DOWN within half a second of holding TRACK to change a Play Modes mode; hold longer and Track Solo starts instead.

Test evidence

0.2.5 starts at HOLD (one data byte). Author functional report on real hardware, 13 November 2026: this package on beta base c1f21351 beside 15 kept modules, a trial with HOLD from the start, the row at HOLD and OFF behaving as stock, then Keep, power cycle and HOLD working again with no menu visit, read back from the device. Emulator control and routine suites passed; measured worst event 1,687 cycles, as 0.2.4. Stock benchmark and stress were waived by the owner for 0.2.4 (no MIDI path); renewal for 0.2.5 pending. See TESTING.md.