How are the waveforms rendered? Are these few or single cycle samples? I noted that, with slight detuning, I was getting inconsistent tracking for the detuning. Higher notes yields wider pitch differences than lower notes.
I was unable to get consistent results with really short envelopes. e.g. 0-4-0-0 AEnv for percussive sounds or synth blips. Similarly, fast filter envelope.
Would you be able to consider an alternate data entry? e.g. Toggle a mode where you can type parameter values in vs. using the sliders & knobs?
I pulled it up on my Surface Pro 3 and, with some zoom, could play it via touchscreen. It would be nice to be able to get bigger keys, touch spots, etc.
Definitely the sort of thing that makes me want to see it grow and continue. Excellent work. Keep it up!