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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Super simple opamp VCA
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kaputtpanzer



Joined: Nov 02, 2009
Posts: 62
Location: Cologne
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PostPosted: Sat Aug 02, 2014 5:21 am    Post subject:  Super simple opamp VCA
Subject description: should be run with single supply...
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Hello,

did someone try something like this? I know it is not a real VCA, but I think for simple audio use it will work. Found it on some youtube videos, from organfairy or so...


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Blue Hell
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Joined: Apr 03, 2004
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PostPosted: Sat Aug 02, 2014 5:59 am    Post subject: Reply with quote  Mark this post and the followings unread

Many people tried this ... it is a clipping mixer.

In the scope trace you can see it outputs the sum of the input signals .. and that there is some clipping when the the saw tooth reaches it's extremes.

The clipping will indeed reduce the level of the input signal as seen on the output, and it will distort the signal too.

When you like the effect of this you may want to go out of the circuit with a decoupling capacitor to avoid DC overload of possibly following signal stages.

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