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…