OPXY playing Seqtrak sounds

Anyone ever tried to hook up the OPXY with a Seqtrak? The latter has some very good sound patches and would be keen to be able to hook them up and create a midi track where sounds from Seqtrak can be played onto OPXY.

Option to connect via usb-c but for whatever reason this does not work, via Bluetooth which generates horrible high pitch distorted noise or via midi in/out which does not work any better.

Thought I’d ask in case someone has done it successfully.

Seqtrak uses a different midi channel per drum past and for synth 1 / synth 2 /synth 3 and sample channel but I was not able to play any of it.

Can’t see why it would be different rhan may other midi external synth or sound module..?