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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  As many as 4 of them, so we'll add 4-voice polyphony.

This is capable of playing samples in high flash memory (> 2M), but we need to be able to store them.  This utility does that:

(The code works, but it needs polish.)  With the 4MB version of PicoADK, that frees up 2MB for samples.

Next, we'll describe how to format and load your own samples.