Hi Guilherme

> I like to make "the music of the moment".So I find the freq.,
> the wave, the interval etc,of the moment.
> I need the tunning(the space between the notes) of the moment

If I understand you correctly, you are looking for a module which gives
you the a voltage, which corresponds to the interval between two notes
you play at the same time, or which corresponds to the interval between
two successive played notes. Is that right

Florian