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Then play wav files in high flash memory, using LittleFS

https://arduino-pico.readthedocs.io/en/latest/fs.html

Then adjust playback speed and amplitude with pots

Then add piezos as triggers, add polyphony

Add MIDI

Add back pots to vary speed and amplitude

Add midi, polyphonyNext we add playback speed adjust with POT1.

After that we will add piezos to control timing and amplitude.

Then we will add polyphony.

Then a utility to store up to four samples in high memory where Arduino downloads won't erase them.