17 Oct
2008
17 Oct
'08
11:09 a.m.
"Ray Rashif" <schivmeister(a)gmail.com> writes:
And regarding MIDI, if I want to take into
consideration dynamics, and let
the piezo trigger MIDI messages with varying attack information, how would
it be done? So depending on the voltage generated, it'd be a MIDI-ON but the
final message to the computer (audio interface) would be a "MIDI-ON &&
ATTACK == 75" sort of logic. Sorry for the noobish description, have just
started to dabble into (audio/midi) electronics.
I know a way to implement this. I've read it somewhere in
Internet. piezo output is limited using zener diode (you want to do this
anyway because next electronic components may get burned out). Then you
can measure width of the impuse. Wider the impulse is, more "attack" you
have. In midi terms drum attack becomes midi note on velocity parameter.
I understand the concept and design roughly and I can move on by reading the
construction manual (refering to edrum's DIY guide), but at the moment I'm
looking for a quick way to build a trigger as I need it asap (and no $$ for
a real trigger kit/module).
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--
Nedko Arnaudov <GnuPG KeyID: DE1716B0>