made a simple program for the raspberry PI:
It reads clock/start/stop from a connected USB-midi device, and sends korg-style sync pulse from a GPIO pin.
So you can for example sync a Volca or Teenage Engineering OP-XX to your Elektron, without having to use CV or the MIDI ports.
Or your TE-OP1 <–> Volca/OP-XX without the OP-Lab.
To use this, you need to hook up a minijack cable to GPIO pin 17 on your PI.
Maybe useful to some of you, let me know how it works.
