As an acoustic instrument player, what caught my attention was Ezra Buchla’s statement:

what i’m working on is: amplitude envelope, fundamental frequency, spectral centroid, and spectral flatness, out to CV with options for scaling/offsets. the decoupling of these last three i have always found sort of magically useful for controlling synth parameters from acoustic instruments.

So this Aleph may not be an immediate buy for me, but color me intrigued… acoustic instrument to CV conversion…