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Documentation Index

Fetch the complete documentation index at: https://docs.sampler.meiji.industries/llms.txt

Use this file to discover all available pages before exploring further.

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MIDI and sync problems

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A controller movement does nothing

Check in order:
  1. Open Settings with ,, then open the MIDI page.
  2. The Monitor sub-view shows incoming events when you move the control. If not, the device is not connected or not sending on the expected channel.
  3. A mapping exists for that control in the Mappings sub-view.
  4. The mapping points to the correct action.
  5. The current view allows MIDI pass-through (see below).

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MIDI mappings stop working in certain views

This is expected. MIDI mappings only fire on the main sampler rows (Pads, Loops, Scenes), Channel Detail, Channel Chop, and the Help overlay. They are intentionally blocked in stateful modals and views — Settings, Bounce, Trim, Search, MIDI Learn, and others — to prevent mapped actions from silently dismissing those screens. To restore MIDI response, close the modal or view and return to a main sampler row or channel overlay. See MIDI Implementation — Route allowlist for the full list. If the monitor shows events but the mapping does not fire, verify the mapping was saved — the status bar confirms each assignment.

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A mapping I just created is not listed

The Mappings sub-view shows a snapshot taken when you entered the tab. If you suspect a display issue, leave the MIDI page with Esc, then reopen Settings with , and return to MIDI to refresh the snapshot.

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A mapping disappeared after I assigned a new one

Mappings are one-to-one. Two situations cause automatic removal:
  • Same control, new action: Assigning a control to a different action replaces the old action for that control.
  • Same action, new control: Assigning a different control to an action removes the old control’s mapping for that action.
Both cases show a confirmation dialog before replacing. If a mapping vanished without a dialog, the control or action was reassigned in a separate step.

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The confirm reassign dialog appeared unexpectedly

This means the MIDI control you moved already has a mapping. Press Enter to proceed with reassigning it to a new action, or Esc to go back and try a different control.

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The confirm overwrite dialog appeared unexpectedly

This means the action you selected is already mapped to a different MIDI control. Press Enter to replace the old control’s mapping, or Esc to go back and choose a different action.

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I accidentally cleared all mappings

Shift+Delete in the Assigning phase clears every mapping. There is no undo for this operation. You will need to re-create your mappings.

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Transport messages show in the monitor but do not affect playback

The transport_enabled setting is off. Open Settings (,) and enable MIDI transport response.

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The monitor is unreadable or flooding

Clock and Active Sensing messages can generate very high volume. Press f in the Monitor sub-view to cycle through filters and suppress noise. Treat these message types as noise unless you are specifically diagnosing a sync problem.

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No MIDI devices appear

Meiji Sampler uses the system MIDI stack. Check:
  • The controller is powered on and connected via USB or a MIDI interface.
  • The device appears in your operating system’s MIDI settings (macOS: Audio MIDI Setup).
  • No other application has exclusive access to the device.