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<p>You'll find the same VCA in the 909 in a few places. (Bassdrum
, Toms, Clap..)<br>
</p>
<p>Note how far the signal is divided down. <br>
</p>
<p>It's noisy, and nonlinear, and has some control feedthrough.
Show what you can get away with for a single monophonic signal.
<br>
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<div class="moz-cite-prefix">The MS10 had the single transistor, the
early "Korg35" MS20 had the same. <br>
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<div class="moz-cite-prefix">The later MS20 had a second transistor,
which makes things more linear/symmetrical and you can run larger
amplitudes -> less noise. <br>
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<div class="moz-cite-prefix">According to the schematics the
transistors shall be selected. jx3p also says "SEL". <br>
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<div class="moz-cite-prefix">Anyone would know what for? Equal gain?
<br>
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<div class="moz-cite-prefix">Best,</div>
<div class="moz-cite-prefix"> René<br>
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<div class="moz-cite-prefix">On 07.04.2023 11:04, Adam (synthDIY)
wrote:<br>
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<blockquote type="cite"
cite="mid:94A497D5-A2CA-4055-9459-E7063747EA64@adambaby.com">
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<div>David G Dixon via Synth-diy pisze:<br>
<blockquote type="cite">
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<blockquote type="cite">
<blockquote type="cite">Whatever the VCA is in the
Korg MS-20 really warms up the sound of that
synthesizer. You can find the schematic on the
internet. I have something redrawn by a fellow
named Marjan Urekar that I looked at years ago. It
involves two transistors. It is evidently also the
VCA used in the Roland JX-3P.</blockquote>
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<br>
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<div>Interesting.... here's the JX3P version</div>
<div><br>
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<div><img alt="grab 2023-04-07 at 6.57.54 pm.png"
src="cid:part1.IjypEZTw.Md0gVlcO@schmitzbits.de" class=""
width="515"></div>
</div>
</blockquote>
<p><br>
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<br>
<p><br>
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<p><br>
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<blockquote type="cite"
cite="mid:94A497D5-A2CA-4055-9459-E7063747EA64@adambaby.com">
<br>
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<pre class="moz-signature" cols="72">--
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