" if I did not know this was a theremin I would be wondering if it was a rather convincing emulation of a theremin." - Gordon
Yes - You said it, IMO, you summed it up...
That, in my opinion, is whats "wrong" with the E-Pro .. Its too "pure" and just doesnt sound convincingly like "a Theremin", probably because its too "perfect".. (possibly made even more noticable when there are no pitch errors which give it away - I am sure that when I played the E-Pro, no one would have had any doubt that I was playing a theremin - they certainly would know it was no keyboard! LOL ;-)
Even though, of course, it absolutely is a theremin by every standard - its a capacitance controlled, beat frequency, heterodyning musical instrument with pitch and volume antennas.
So why does it, to my ears, sound like "not quite a theremin" ? I think it comes down to the mixer... The mixer in the E-Pro is about as far as one can get from the mixer in one of Lev's theremins as is possible - and this distance was not an improvement.
Amey's use of the E-Pro for this piece was, I feel, a good choice - I think the "flutey timbre" (it is, in fact, "flutey" because the source audio from the E-Pro is a triangle wave containing only odd harmonics - deliberate distortion gives some even harmonics for some E-Pro sounds, but the instrument is predominent in odd harmonics) suits this piece.
And Amey has only had this particular theremin for a few days.. and manages to play with this piece so beautifully and select the right voice.. Truly impressive IMO!