VCA White noise
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VCA White noise

by danny29 on Wed Aug 22, 2012 10:50 am

Hi all, I've just finished building my xoxbox! Everything works fine but I noticed a white noise each time a note is played, the noise is not filtered when sweeping the cutoff pot so I gues the problem is in the gate circuit or in the vca...

here some audio examples: https://dl.dropbox.com/u/28419373/white ... xoxbox.mp3

Does anybody know how can eliminate or at least reduce, this noise?

Thank you indeed!
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Joined: Wed Aug 22, 2012 10:34 am

Re: VCA White noise

by antto on Wed Aug 22, 2012 11:24 am

i don't hear it, so it's around the normal levels
analog synths always have some noise, that's how it is

i think you shouldn't worry about this
maybe there are ways to try and reduce it, but is it worth it?
We are here too: irc.freenode.net >>> #x0xb0x
..:: c0nb0x v1.00 ::.. http://forums.adafruit.com/viewtopic.php?f=7&t=29282 (new control app - win/osx)
VCO Tuning: http://forums.adafruit.com/viewtopic.php?f=12&t=24759 (do it the EASY way)

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Joined: Thu Apr 15, 2010 3:21 pm

Re: VCA White noise

by openchallenge on Wed Aug 22, 2012 3:38 pm

I just hear a normal amount of analog breath. if you are hearing a sh sound like white noise check your speakers. :)
Posts: 16
Joined: Sun Jul 29, 2012 12:58 am

Re: VCA White noise

by diplowave on Wed May 09, 2018 3:24 pm

It's a detail that i myself opened a topic on a french-speaking forum. We particularly hear this white noise when the cutoff is low, in fact it's quite normal. Except that some x0xb0x do it more than others. As for the TB303, some have more white noise than others. It can not be reduced, except by lowering the volume.

Posts: 99
Joined: Wed Aug 21, 2013 9:49 am
Location: France

Please be positive and constructive with your questions and comments.