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Hyde
Joined: Jul 15, 2004 Posts: 118
G2 patch files: 2
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Posted: Wed Jun 02, 2010 11:41 pm Post subject:
is there any way to automate a volume knob IN the G2 Engine? |
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this will sound weird, but one of the projects i am working on is a sound CD for a Halloween effects company that makes a lightning controller.
rather than automating it via Logic (DAW), i wondered if it could be done on just a patch. what i need is a simple patch that has a constant noise output of 200-400Hz (anywhere in there is fine) and a volume knob that is automated to go back and forth from 0-127 (kinda like a SINE wave).
then another knob would need to control how fast the volume knob would twist back and forth. 2 knobs - that's it. second knob would need to control it from real slow to real fast. it's for some sort of UFO prop that will have pulsing lights and the lightning controller unit is made to react to the 200-400Hz range.
i tried just an oscillating SINE wave but it didn't make the lights look right. any ideas? can this be done?
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Antimon
Joined: Jan 18, 2005 Posts: 4145 Location: Sweden
Audio files: 371
G2 patch files: 100
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Hyde
Joined: Jul 15, 2004 Posts: 118
G2 patch files: 2
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Posted: Thu Jun 03, 2010 6:40 pm Post subject:
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unfortunately, no.
the signal has to be a SINE wave signal (to have the correct frequency to trigger the light unit). i need the volume knob or level meter in the nord to be automated to turn the volume up and down and up and down - so that by itself it's just going back and forth on it's own.
then i need a second knob that affects how fast that volume knob/slider is turning the volume up and down:
can some other people also chime in on this please? |
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jamos
Joined: Jun 01, 2004 Posts: 514 Location: Eugene, Oregon, USA
Audio files: 4
G2 patch files: 41
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Hyde
Joined: Jul 15, 2004 Posts: 118
G2 patch files: 2
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Posted: Thu Jun 03, 2010 10:10 pm Post subject:
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Antimon and Jamos,
thank you for helping me out! i appreciate it very much.
i have tried this same thing before and it didn't work. the problem with doing this as just an modulated SINE wave as opposed to something that affects the level (turning the volume up and down) is that as a SINE wave - the lights stay on for 3/4 of the peak and 1/4 for the lows. meaning that instead of an *even* ramping up and down of the lights from off to maximum brightness, the modulated osc (like Jamos') the lights are on most of the time. this is because the light controller actually picks up sound between 40Hz and 12kHz. it is brightest between 140Hz-700Hz.
so if an oscillator peaks at say 300Hz, the lights will actually already be at full brightness at 140Hz-700Hz.
this is why i need something that controls the VOLUME of a constant signal with no volume being at '0' and full volume being at '127'.
in the diagram the lights are off in the black area, ramping up from off to full-on in the grey area and full-on in the white area:
i've seen other patches in the archives where different knobs seem to be turning up and down on their own like they are automated. this is the effect i am trying to achieve with some sort of volume knob or slider or something. |
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Antimon
Joined: Jan 18, 2005 Posts: 4145 Location: Sweden
Audio files: 371
G2 patch files: 100
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Posted: Thu Jun 03, 2010 11:17 pm Post subject:
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But we are controlling the volume! Jamos was a bit more clever than me and used the LevMult instead of the ring modulator, but what happens for both of us is that the output of a noise module (mine) or oscillator (jamos's) is amplitude modulated (i.e. the volume goes between zero and full). You can change the rate of on/off/on/off simply by turning the LFO's frq knob.
If you want the signal level to remain high for a shorter amount of time, you can replace our LFOs with a shape LFO set to square wave. You can change the width of the square to something that suits you better.
If you don't want an oscillating signal being amplitude modulated, but rather a DC signal going from, say, zero Volt to a steady 5 Volts then back again - I'm sorry, that can't be done without doing a DC-coupling modification to your G2 hardware.
/Stefan _________________ Antimon's Window
@soundcloud @Flattr home - you can't explain music |
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Antimon
Joined: Jan 18, 2005 Posts: 4145 Location: Sweden
Audio files: 371
G2 patch files: 100
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Posted: Thu Jun 03, 2010 11:20 pm Post subject:
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Let me just clarify that the knob you put a red circle around is implemented by our LFO+Lev Multiplier combo.
/Stefan _________________ Antimon's Window
@soundcloud @Flattr home - you can't explain music |
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iPassenger
Joined: Jan 27, 2007 Posts: 1067 Location: Sheffield, UK
Audio files: 5
G2 patch files: 78
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Posted: Fri Jun 04, 2010 1:12 am Post subject:
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Antimon wrote: |
If you want the signal level to remain high for a shorter amount of time, you can replace our LFOs with a shape LFO set to square wave. You can change the width of the square to something that suits you better.
/Stefan |
You could also route the lfo waveform through any of the shaper modules to help get the sweep/pulse you want. Probably trial and error to get this right. _________________ iP (Ross)
- http://ipassenger.bandcamp.com
- http://soundcloud.com/ipassenger |
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Hyde
Joined: Jul 15, 2004 Posts: 118
G2 patch files: 2
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Posted: Fri Jun 04, 2010 1:44 am Post subject:
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Antimon wrote: | But we are controlling the volume! Jamos was a bit more clever than me and used the LevMult instead of the ring modulator, but what happens for both of us is that the output of a noise module (mine) or oscillator (jamos's) is amplitude modulated (i.e. the volume goes between zero and full). You can change the rate of on/off/on/off simply by turning the LFO's frq knob.
If you want the signal level to remain high for a shorter amount of time, you can replace our LFOs with a shape LFO set to square wave. You can change the width of the square to something that suits you better.
If you don't want an oscillating signal being amplitude modulated, but rather a DC signal going from, say, zero Volt to a steady 5 Volts then back again - I'm sorry, that can't be done without doing a DC-coupling modification to your G2 hardware.
/Stefan |
thanks again, sir
i tried everything you said. it doesn't work the way my client wants it to. the light gets too bright too fast. i cant seem to slow the ramping up and down of the light no matter which modules i put in there. in one second - it goes from dark to bright. he wants a nice gradual ramp up and back down 2-3 seconds long. its supposed to look like a slow pulsing lights on a UFO.
would a step sequencer work for volume or something? something i could slow down and speed up the BPM?? |
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ian-s
Joined: Apr 01, 2004 Posts: 2669 Location: Auckland, New Zealand
Audio files: 42
G2 patch files: 626
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