Tracker’s MIDI out can serve as MIDI thru. However, this behavior only happens when a MIDI channel is selected as an instrument in Tracker. The information about MIDI channels coming from the MIDI source is ignored.
Have the Play connected to the Tracker, and then the Tracker connected to another hardware synth. Then be able to play and sequence the synth from the Play, based on the MIDI channel defined in the Play.
- Get a MIDI Y-adapter splitter cable, and connect the Play directly to the Tracker and the synth, avoiding Tracker’s MIDI thru.
- Select the synth’s MIDI channel as instrument on Tracker. This only works if you don’t need to do anything with other instruments on Tracker.
This works as intended connecting the Play with Medusa, and then Medusa with the synth. It is worth noting that the Medusa has a dedicated MIDI thru port.
MIDI thru is expected to pass not only note data but also channel data, and many products do just this.