Hi there,
I made a polyphonic step sequencer in pd. It is currently running not on a pisound but just a laptop. But at least it is running pretty nicely and on pd vanilla :). I hope to port it on to my pisound in the next days. Until then please check out this demonstration I made about the sequencer:
I hope it won’t be too tricky. I may come back with further questions. But up until now I’m just happy about the sequencer running mostly as it should, so I wanted to share that. You can also download the patch on github (link in the description of the video)