Customize button LEDs via midi command

• MIDI Controller
• programming
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• j

  juanmfer New member

  11/3/25, 7:06 AM

  Hi!
  I have a TempoPAD C16. I'd like to know if it's possible to send a MIDI command to a CC button (in my case, the recording arm button) so that it turns on or off at will. I've been able to do things with SysEx commands, like bulk channel switching, but I can't figure out how to do this.
  Thanks!

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• S

  SynidoStaff02 Admin Staff Member

  11/4/25, 11:33 AM

  Hello, your idea is feasible. You can learn and map it on your DAW software or hardware.

  If you have any questions, please feel free to contact us again. We are happy to help.

  Thank you for your purchase and support.

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• j

  juanmfer New member

  11/5/25, 1:29 AM

  Thanks for replying!
  I'll rephrase my question with more details.

  Environment

  • Controller: Synido TempoPad C16

  • DAW: Ableton Live 12.2 Suite

  • OS: Windows (PowerShell / sendmidi available)

  • Button mode: Toggle (TC)

  • Mapping: Live’s MIDI Map (pad → DAW works)

  Issue

  When I toggle Arm Record from the DAW, the corresponding LED on the C16 does not change. It gets out of sync (DAW ON / LED OFF, or vice-versa).

  Also, switching banks on the C16 turns all LEDs off, so I lose the visual reference of the DAW state.

  Expected

  C16 should accept host feedback so the LED reflects the parameter state (ON/OFF) even when the change comes from the DAW.

  Observed (data)

  • MIDI frames captured when toggling Arm in Live and on the pad (they match):

    • B0 31 7F (CC#49 ch1 value 127)

    • B0 31 00 (CC#49 ch1 value 0)

  • Direct test with sendmidi to the C16 port (no DAW, no routing):

    • cc 49 127 / cc 49 0 → no LED change

    • Also tried Note On/Off on ch1/ch2/ch10 → no effect

  • The vendor app can’t force that LED’s state, and I see no outgoing MIDI when changing options there.

  Steps to reproduce

  1. Map a C16 button (CC#49 ch1) to a track’s Arm in Live.

  2. Toggle Arm from Live.

  3. Observe the C16 LED does not change.

  4. Switch Bank on the C16 → all LEDs turn off.

  Questions / request

  1. Do C16 LEDs accept host feedback over MIDI (CC/Note), or are they local-only?

  2. If they do, what’s the exact protocol (CC, Note, vendor SysEx?) to set a button LED ON/OFF (controller numbers, values, per-bank channels)?

  3. Is there SysEx/MIDI implementation documentation for LED feedback and bank handling?

  4. Can we prevent bank switching from clearing LEDs, or programmatically re-inject state when returning?
     
     Thanks!

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