Hi @rojele. It sounds like you have a decent solution in Pd but I will just mention that my Processing library Pd4P3 GitHub - robertesler/Pd4P3: A real-time audio synthesis library for Processing 3. Pd4P3 implements Pure Data's signal processing objects via Pd++ native code. Pd4P3 stands for "Pd++ for Processing 3". brings all of the signal processing of Pd into Processing using Native code.
You can read from the same array using multiple [tabread4] objects, but with the Java lib you could also create and or destroy the Tabread4 objects as you need them or even copy the array if you need to.
There is an example I use from Pd’s here: Pd4P3/TimeCompression.pde at main · robertesler/Pd4P3 · GitHub
It reads from a single array from different Tabread4 objects. I happy to help if you need any. Your project sounds interesting. Good luck.