kslider note off on poly patch

Hi, newbie here.

I've been reading a lot about kslider, poly, and thispoly, but I still don't quite get the key part. I can use my MIDI controller to manage the polyphonic voices of this synth with adsr without any issues — but not with kslider. It always holds a note.

I’ve tried using makenote, but of course, the sustain level doesn’t work properly because of the fixed duration parameter in makenote.

If anyone can help, I’d really appreciate it!

general patch:

osc patch