Well I have found a nice schematic with PCB, and part layout.
http://www.musicfromouterspace.com/a...th/midi2cv.htm
it looks great, but there are some parts without any detail...

not good
is it possible to do this conversion with a kX project plugin?
i mean
from a keyboard to the MIDI port of my sound card
and the CV/Gate and TRIG OUT might could be the LINE OUT.
what do you think?
by the way, i think i should buy the book called 'Programming sound cards in Assembly an Pascal

'
bye,
vb