I had 8-ish channel FM synthesis (using a bunch of lookup tables) on a stock 8-bit ATMega-based Arduino back in the day. Any modern Cortex-based microcontrolle

I had 8-ish channel FM synthesis (using a bunch of lookup tables) on a stock 8-bit ATMega-based Arduino back in the day. Any modern Cortex-based microcontroller has more than enough oomph to handle 4x as many voices plus filters, etc.