After building both an Ambika and Shruthi, I have been thinking: What about a sampler compatible with Shruthi filter boards? If going that route it would be mono-/paraphonic, so maybe that’s not very fun to play? Plus would building it on an ATMega base make any sense, performance wise? STM32 would be the obvious choice, although if run monophonic, one could probably stream the sample directly from an SD card even on an ATMega.
If one builds a polyphonic Sampler, one Filter per voice would be required, thus it would result in a Ambika-like architecture. The voicecard hardware could maybe even be reused, by streaming the samples via SPI, although the bus would get very busy. The ATMega328s probably don’t have enough RAM to cache the samples when a patch is loaded.
Has anyone ever conveyed such a project, or would be interested in a monophonic samplers? I didn’t find any monophonic sampler besides the microgranny, probably for a reason…
Edit: for the Monophonic, Shruthi-ish device, i wouldn’t even change much. More or less just replacing the oscillators with a sample that gets played back, and maybe adding a DAC(+ADC) to have higher resolution.