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CV inverting without an inverter? |
Kaput
merry prankster
Joined: 25 Jan 2012
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Location: UK
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 Posted: Sat Mar 03, 2012 10:47 am Post subject: CV inverting without an inverter? |
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One of my favourite things in the modular world is discovering ways of using modules for things they weren't originally designed to do... so I'm wondering if CVs can be inverted without a dedicated inverter module like the Doepfer A-175?
I'm curious.
Can it be done? 
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chinard
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| Posted: Sat Mar 03, 2012 11:15 am Post subject: |
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bronko
Common Wiggler
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Location: dresden
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| Posted: Sat Mar 03, 2012 11:26 am Post subject: |
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| you can use a polarizer like the doepfer A-133, a ringmod or modDemix. |
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thermionicjunky
Thyratron Genius
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| Posted: Sat Mar 03, 2012 11:29 am Post subject: |
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| Use the CV to control the amplitude of a fixed negative voltage. |
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MadGav
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| Posted: Sun Mar 04, 2012 6:46 am Post subject: |
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This was one of the reasons I bought an A-133, along with using it as attenuators, ring mods... Navs
has a great page on this. A very basic thing my current (pathetic little) rig struggles with is producing a fixed voltage, end up feeding something into A-119 to force the gate out on. But I also want to use the 119 as on overdrive... |
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Buckyball
Learning to Wiggle
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Location: Nashville
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| Posted: Sun Mar 04, 2012 3:00 pm Post subject: |
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| Can you use a patch cable with one end wired backwards? (Tip-to-sleeve, sleeve-to-tip) |
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Navs
Super Deluxe Wiggler
Joined: 18 Sep 2009
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Location: Berlin, Germany
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| Posted: Sun Mar 04, 2012 3:09 pm Post subject: |
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Without a dedicated module, right? Yes, sort of.
Got a VC ADSR with an inverted output? Turn A, D & R to zero. Sustain becomes your voltage. Gate the envelope and send your CV to control the sustain level. Tap the inverted output.
But really, just get a bloody inverter 
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dogoftears
Puddle of Sealions
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Location: NorCal
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| Posted: Sun Mar 04, 2012 3:15 pm Post subject: |
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| Navs wrote: | Without a dedicated module, right? Yes, sort of.
Got a VC ADSR with an inverted output? Turn A, D & R to zero. Sustain becomes your voltage. Gate the envelope and send your CV to control the sustain level. Tap the inverted output.
But really, just get a bloody inverter |
Or a foni mixer... Four tunable invertable offsets.
Cant live wo it.
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wmonk
Common Wiggler
Joined: 03 Jun 2010
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Location: Utrecht, The Netherlands
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| Posted: Sun Mar 04, 2012 3:32 pm Post subject: |
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| Buckyball wrote: | | Can you use a patch cable with one end wired backwards? (Tip-to-sleeve, sleeve-to-tip) |
No you can't, as the circuitry still has a common ground (from the power supply).
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