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Vactrol chiptune squarewave osc (w/ audio and schematic)
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Author Vactrol chiptune squarewave osc (w/ audio and schematic)
Tombola
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Joined: 23 Jan 2011
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PostPosted: Wed May 04, 2011 4:24 pm    Post subject: Vactrol chiptune squarewave osc (w/ audio and schematic) Reply with quote Add User to Ignore List

13 components, based on hex schmitt trigger, lives up to its name.
Will post schem and audio...


Last edited by Tombola on Thu May 05, 2011 8:50 am; edited 2 times in total
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J3RK
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Joined: 22 Dec 2009
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PostPosted: Wed May 04, 2011 4:41 pm    Post subject: Reply with quote Add User to Ignore List

I'd love to see these!
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gde
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PostPosted: Wed May 04, 2011 5:19 pm    Post subject: Reply with quote Add User to Ignore List

it has an interesting proximity to the quantizer....
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falafelbiels
still learning to wiggle


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PostPosted: Thu May 05, 2011 3:09 am    Post subject: Reply with quote Add User to Ignore List

Audio or it just barely exists...
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falafelbiels
still learning to wiggle


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PostPosted: Thu May 05, 2011 3:11 am    Post subject: Re: Vactrol chiptune squarewave osc Reply with quote Add User to Ignore List

Tombola wrote:

Will post schem and audio...


falafelbiels wrote:
Audio or it just barely exists...


Whoops, sorry bout that.....
patience is not a virtue of mine so much that I don't take the time to read on these here forums. I just watch the pretty pictures and shout a lot.
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Jarno
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PostPosted: Thu May 05, 2011 4:29 am    Post subject: Reply with quote Add User to Ignore List

falafelbiels wrote:
...and shout a lot.


Confirming the public opinion on people from your particular city. Mr. Green
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falafelbiels
still learning to wiggle


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PostPosted: Thu May 05, 2011 4:50 am    Post subject: Reply with quote Add User to Ignore List

FEYENOORD! HOOLIGANS!
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Pfurmel
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PostPosted: Thu May 05, 2011 5:25 am    Post subject: Reply with quote Add User to Ignore List

This looks very promising indeed
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Tombola
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PostPosted: Thu May 05, 2011 5:44 am    Post subject: Reply with quote Add User to Ignore List

gde wrote:
it has an interesting proximity to the quantizer....


It definitely DOESN'T track 1v/oct!
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Tombola
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PostPosted: Thu May 05, 2011 6:15 am    Post subject: Reply with quote Add User to Ignore List

Here's the schematic and a pic, including very chic black electrical tape vactrol. It has one LED and two LDRs. I used different brands of LDR to make the second osc track differently from the first.

In this rather poor demo, the first sound is a good oscillator (RS-95e) to give an idea of the random CV going into the osc. It then switches to the bad oscillator. The notes explain what's going on

http://soundcloud.com/musicthing/bad-osc-test

[s]http://soundcloud.com/musicthing/bad-osc-test[/s]




DIY vactrol oscillator by Tom.Whitwell, on Flickr


Last edited by Tombola on Thu May 05, 2011 10:23 am; edited 2 times in total
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