This is an interesting question. How to do this with the fewest modules.
A comparator by itself isn't enough afaik. It will follow the gate you
patch into it and output the same thing. So the comparator accomplishes
nothing. Or if you set the bias negative enough you will get an
unchanging 0v output.
A DSG or DTG can give you a couple things... send the gate into the trig
input and set the rise/fall times to fastest and you get a spike at the
output jack. Note that this is not a fast rectangular pulse but a spike
with steep sides. At the GATE output you'll have an inverted pulse -
normally +5v, dropping to 0v for an instant when the incoming gate
signal goes high, then returning to +5v.
So here's a handful of ways to do it but they all need 2 modules:
1. Send gate to trig input of DSG with rise/fall time set to minimum.
Send DSG output to comparator.
2. Send gate to input of an audio mixer module. Send the output to a
comparator.
3. Send the gate to trig input of DSG as above. Send DSG gate output to
an inverter in a BLOG.
4. Send gate to trig input of DSG as above. Send DSG gate output to a
processor module set & biased to invert the signal.
I can't think of many reasons why I'd need a short rectangular pulse
from a gate. If I want to do percussion I'd just patch it into trig of
DSG and use the DSG's output for enveloping. Or patch it into trig in
of VCFQ for a variety of percussive effects.
Ditto for using a gate to advance a sequencer stage or sample/hold.
It'll work fine, you won't need a pulse.
A couple side-notes... you can use the comparator to generate pulses to
trigger envelopes for arbitrary quantizer transitions. If you feed a
slow sinewave into a quantizer to get a rising/falling staircase a
comparator can be used to compare the incoming & outgoing voltage of the
quantizer and generate a trigger anytime the quantizer output changes.
Very handy.
Also, did you know the trig button on the random source creates a trig
output on the trig jack? Not a gate but a fast pulse.
Now back to your patching, all of you ;)
JP
cuari7 wrote:
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> --- In SergeModular@yahoogroups.com, "metafoetus2002" <jan-
> hinnerk.helms@t...> wrote:
>
>>Hm. Does anybody have an idea how to turn a gate signal into a
>
> trigger signal
>
>>in the Serge?
>
>
>
> I would think/hope with the comparators.
> My next 2 panels will have a couple of those, mostly to add
> squares/pulse/PWM to the PCO's, but maybe I could use them to turn a
> gate into a brisk, short-lived trigger.
> What do you think, forum elders?
>
> cuari
>
>
>
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