Give the audio track and external MIDI track different channels. Sharing a channel can block the MIDI track’s incoming data even though the cable is working.
Try these checks
- Inspect the audio-track TRIG CHANNEL assignments in PROJECT → MIDI → CHANNELS.
- Inspect the affected MIDI track’s NOTE SETUP channel. Replace an unassigned X if the track needs to send notes.
- Choose a MIDI-track channel that does not collide with an audio-track channel, match the external instrument, and retry the note.
Diagnose it
Do an audio track and the MIDI track share a channel?
Yes: Separate the assignments and retry.
No: Check the MIDI track’s assigned channel and the external sender.
What should happen
The channel collision no longer blocks the MIDI track’s input.
Why this happens
Octatrack has internal routing rules in addition to ordinary external MIDI channel matching.
If it still doesn’t work
Check the connections and settings described above. If your device behaves differently, email us with its model, firmware version and the steps you tried.
All Octatrack MKII fixesMore about Octatrack MKII
Similar symptoms on other gear
These guides cover other models. Use the instructions for the device you are setting up.
Sources & review
Sources reviewed: . Documentation does not replace a physical hardware test.
- Octatrack MKII User Manual · Elektron · MKII · OS 1.40A · 14 April 2021 · last checked 2026-11-05
Sections reviewed: §8.7.3, p. 41; §15.1–15.2, p. 90.