<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr" style="direction: ltr;">Let me know if you can’t see this image</div><div dir="ltr" style="direction: ltr;"><img src="cid:B4D55234-85F7-40D0-BD1C-52A98A1A6446-L0-001"><br></div><div dir="ltr"><br><blockquote type="cite">On Aug 19, 2020, at 5:03 PM, Pete Hartman <pete.hartman@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div><div dir="auto">What does the envelope circuit look like</div></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Aug 19, 2020 at 4:45 PM Didier Leplae via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div><div style="font-family:verdana,helvetica,sans-serif;font-size:13px"><div dir="ltr" style="font-family:verdana,helvetica,sans-serif">We are working on an analog drum module that uses a simple envelope created from a trigger to control the amplitude of a triangle oscillator with a basic OTA based VCA.</div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif"> </div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif">We are having a problem with a slight clicking sound at the beginning of many of the drum hits. We think this is because the attack of our envelope is so sharp that the beginning of our drum hit looks like a straight jump from 0V to wherever the triangle wave happens to fall. Therefore the click is somewhat random in that it doesn't occur when the triangle happens to be low at the time of attack.</div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif"><br></div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif">Can anyone suggest a simple way to deal with this, like adding a slight bit of attack time to the envelope? How could this be done without adding too many parts?</div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif"><br></div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif">Thanks,</div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif"><br></div><div dir="ltr" style="font-family:verdana,helvetica,sans-serif">Didier</div></div></div>_______________________________________________<br><br>Synth-diy mailing list<br><br><a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br><br><a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br><br></blockquote></div></div>
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