I took a look at the monostable approach. It made me realize that I forgot to
mention that the drum triggers are velocity sensitive. That is to say, the
voltage waveform should be preserved and passed through to the MIDI brain. A
monostable with logic gate wouldn't work, whereas the Analog Logic AND should
(unless I'm misunderstanding it) pass through the exact ANDed waveform.
________________________________
From: cg_synth <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Sun, May 29, 2011 11:18:46 PM
Subject: [cgs_synth] Re: CGS26 analog logic for electronic drum triggering?
I doubt the two drum signals would coincide for long enough to generate a useful
output. I'd suggest firing off some sort of monostable and using a logic gate
connected to that.
Ken
mention that the drum triggers are velocity sensitive. That is to say, the
voltage waveform should be preserved and passed through to the MIDI brain. A
monostable with logic gate wouldn't work, whereas the Analog Logic AND should
(unless I'm misunderstanding it) pass through the exact ANDed waveform.
________________________________
From: cg_synth <sasami@...>
To: cgs_synth@yahoogroups.com
Sent: Sun, May 29, 2011 11:18:46 PM
Subject: [cgs_synth] Re: CGS26 analog logic for electronic drum triggering?
I doubt the two drum signals would coincide for long enough to generate a useful
output. I'd suggest firing off some sort of monostable and using a logic gate
connected to that.
Ken
--- In cgs_synth@yahoogroups.com, "dchang813" <dchang813@...> wrote:
>
> Hi--
>
> I've been looking for a way to combine the AC voltages from two separate piezo
>transducers such that I can detect when both have been struck at the same time.
>The analog AND feature of the CGS26 seems perfect, but considering that the
>waveforms of drum triggers are typically very short spikes (sudden high jump in
>voltage that disappears within milliseconds or possibly shorter), it raises the
>question of--for lack of a better phrase--"time slice resolution."
>
> That is to say:
>
> Is there a time-slice resolution unit under which a few-millisecond voltage
>spike in the waveform wouldn't be conveyed to the AND output?
>
>
> I'm guessing no, since the analog AND should be able to combine waveforms with
>very high audible frequencies, but I figured it wouldn't hurt to ask before I
>order. I guess other rewordings of the question are whether or not the waveform
>created by a piezo transducer being struck is an audible frequency or if the
>highest frequency the CGS26 is high enough to capture the waveform of the
>trigger strike.
>
> Thanks--looking forward to hearing from you and subsequently trying this board
>out!
>
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