Hmm, I was hoping that the AND would join the intersection between the spike
waveforms. Let's imagine two identical perfectly triangular spikes with 30V
peaks but spaced 1ms apart. The bottom of the "valley" formed by the overlap of
the waveforms (the tip of the resulting AND waveform) could be, say, 20V, enough
to trigger a MIDI note if I set the sensitivity on the brain low enough.
But your other suggestion is a good one, and I'll investigate that too. Thanks,
Ken!
Dennis.
________________________________
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
waveforms. Let's imagine two identical perfectly triangular spikes with 30V
peaks but spaced 1ms apart. The bottom of the "valley" formed by the overlap of
the waveforms (the tip of the resulting AND waveform) could be, say, 20V, enough
to trigger a MIDI note if I set the sensitivity on the brain low enough.
But your other suggestion is a good one, and I'll investigate that too. Thanks,
Ken!
Dennis.
________________________________
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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