MFOS VCA X4

Skrog Productions

Hi there.

Last module from 2005 to get the "space management" treatment Smile

.

Ordered another twin VCA board from Ray a week ago & some envelopes.

Two Vca's required for bass / melody lines and the other two vca's for control of cv's.
Here's a pic of the old module and a pic of the new panel i made & a jpeg of the layout.

hope to finish this in a few weeks .

I hear PHoBos is building a Quad vca too Very Happy

Dave.

Old VCA from 2005.JPG

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MFOS Quad VCA.JPG

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Quad VCA july 2011 blue small.JPG

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ashleym · Joined: Aug 20, 2009 Posts: 181 Location: uk

Your system is still huge. Without these reductions it would have gone out of control- then again perhaps it did!!

If you dont mind me asking? I see you have some Ian Fritz modules, I was thinking of building the The DoubleDeka Ultrasonic VCO do you have any views or experience? (I know I can ask elsewhere but I am asking here because I have some level of "understanding" of what you are up to if you see what I mean??)

PHOBoS

bubzy · Posted: Thu Jul 28, 2011 12:47 am Post subject:

nice design as always dave. Just a quick question though, those "log/lin" swiches you got, they switch the pots from log to linear? and how??

PHOBoS · Posted: Thu Jul 28, 2011 6:03 am Post subject:

Skrog Productions · Posted: Sat Jul 30, 2011 8:13 am Post subject:

Skrog Productions · Posted: Sat Jul 30, 2011 8:19 am Post subject:

finished the Quad VCA , sitting in the modular now contented Very Happy

I'll post a quick audio file over the weekend when i have time .

Top 2 VCA's are the 2010 version pcb and the lower 2 VCA's are the original 2005 pcb without the bias trimmers , these ones are for my "cv controlled modulations" Very Happy

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Dave.

Quad VCA.JPG

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wmonk · Posted: Sun Jul 31, 2011 5:22 am Post subject:

Skrog Productions · Posted: Mon Aug 01, 2011 11:53 am Post subject:

Short sound test of manual trig push ADSR patched to a VCA cv input with an LFO patched to vca signal in , vca signal out to a vco cv in, the vco runs at a constant frequency until the ADSR is fired.

Dave.

MFOS vca cv modulations.mp3

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