It should be doable with midi pitchbend:
https://sites.uci.edu/camp2014/2014/04/30/managing-midi-pitchbend-messages/
https://forum.pdpatchrepo.info/topic/13028/midi-pitchbend

Hello, I hope a double post is fine in this case (same as in the OF forum):
I am happy that this is possible, maybe without ofxPD too, but did not figure that out yet.

https://audioplayer.handmadeproductions.de/

https://github.com/Jonathhhan/ofEmscriptenExamples/tree/main/emscriptenAudioPlayer2

This is the first case, besides audioWorklets, where I had to use the -s USE_PTHREADS=1 flag with Emscripten for making Pure Data`s [writesf~] work…

@Enkerli I thought it works exactly like you want it to, but maybe it does not work for floats like that (for example the MIDI-value 42.3).
I will have a look, if I have some time. Perhaps @ingox knows it better?

Edit: I tested it and think no note is filtered out...

@60hz maybe just try to delete what is written in the first line of the shader?

@60hz hmm. For me even the v3 version works without problems (with Windows) with Ofelia v4. And I don't think shaders need to be programmed differently for OSX. But maybe I am wrong. Maybe you need to specify the GL version in Ofelia?
Btw: I updated ofxOfelia (inofficial): https://github.com/cuinjune/Ofelia/issues/78

@svanya with [float $] you get the number if the [clone] instance. You can pass this as a variable into [expr].
Not sure about the second one, but I was thinking of this thread: https://forum.pdpatchrepo.info/topic/10798/setting-expr-formula-dynamically/20

I just applied recently with my midifilemarkovgenerator which is based on this abstraction for the MIDI innovation awards:
https://www.midi.org/component/zoo/item/midifilemarkovgenerator
Not sure, if it makes sense. But you can vote for it or something else until the 14th of may, if you like it...

@Orm that sounds great. Would be nice to try your external.

I solved it with sending raw midi data.