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LFO OUT to GATE IN
Posted: Fri Nov 06, 2009 7:02 am
by jazzymike
Hello brothers and sisters in Moog.
Have a small question regarding the GATE CV IN on a Voyager.
I'm fairly new to CV control, so the question might sound dumb:
Does a GATE IN require a steady on/off signal, or could I trigger it from my MF-103's LFO OUT?
The idea is: as long as the MF-103 outputs some LFO signal, the Voyagers Filters and Env's stay open. Or will results vary with the rise and fall of the LFO?
kind regards,
mike
Posted: Fri Nov 06, 2009 10:24 am
by r05c03
You should be able to trigger the gate with a variety of signals. Once the voltage reaches the point that the gate is triggered, the gate opens an ENV it is triggered and will stay way as long as the voltage is above the trigger level. A gate is an "all in" kind of thing.
Posted: Fri Nov 06, 2009 10:29 am
by jazzymike
Many thanks r05c03!
Is there any way to find out where the trigger threshold lies in terms of voltage?
Posted: Fri Nov 06, 2009 12:10 pm
by jazzymike
Just tried feeding LFO OUT to GATE IN.
Gate opens slightly when LFO is 30% to mid cycle.
GATE is fully open at LFO peak.
I guess it does require a steady on/off (pulse/square) to remain open.
Posted: Fri Nov 06, 2009 1:26 pm
by EricK
I guess you can think of it like you need to hold the key down to keep the envelope open.
Eric
Posted: Fri Nov 06, 2009 2:52 pm
by r05c03
Check you VCA and VCF setting that might be what is causing "slightly open" sound. If your envelops are set to open slowly, you should not hear anything if you increase the speed of the LFO. Try sending a square wave.
Posted: Fri Nov 06, 2009 4:23 pm
by EricK
Oh there was something that I read about using the external envelope in. I think you need to jack your sustain all the way open to use it properly, so your input signal doesn't die.
If that doesn't work try messing with the decay too.
Posted: Sat Nov 07, 2009 6:38 am
by jazzymike
r05c03 wrote:Check you VCA and VCF setting that might be what is causing "slightly open" sound. If your envelops are set to open slowly, you should not hear anything if you increase the speed of the LFO. Try sending a square wave.
Naturally I made sure the VCF and VCA are at 0 attack, full sustain etc.. before doing the test.
It makes sense, that the GATE will follow the curve of the LFO.
I just thought for a second the GATE might be a different kind of CV with on/off state and no Grey areas ,)