@k0872 thanks for the info 90$ is expensive !
I should try Thor !

Can we exchange on our experience, if any, with iPad apps ?
I found iMini very reactive to cc11
Thumbjam & iM1 are quite good with some midi tweaking
Others where I needed to adapt volume to cc11, which is limited, are: iSEM, Animoog, Model15 , LayR
Thanks

Yes it does exist on EWI 4000
An other trick for sustain is to use an audio looper pedal ...not exactly what you are looking for but works pretty well

Hello, the idea of 2 notes at the same time "EWI like" would be very nice and welcome (octave down more than fix note but both are very interesting)