[sdiy] Real piano keyboards: any use?

[David G. Dixon]

> It does indeed!
> I think the best way to achieve this kind of control is to have a
> continuous optic distance sensor. This can give you acceleration
> output and position output.
> Imagine having a synth style keyboard with the position going to the
> volume of the voice, and the speed going (through a non-symmetric LPF
> with a long release) to the volume of the suboctave. This would be a
> great lead/pad patch.

Did you mean "non-symmetric AR" as in fast attack, long release?  What is a
non-symmetric LPF?