<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">I have this keyboard->CV pcb lying around somewhere from the late great Ray Wilson:<div class=""><br class=""></div><div class=""><a href="http://musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&PROJARG=SINGLEBUSSKEYBOARD2007/SINGLEBUSSKEYBOARD2007.php&VPW=1325&VPH=1199" class="">http://musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&PROJARG=SINGLEBUSSKEYBOARD2007/SINGLEBUSSKEYBOARD2007.php&VPW=1325&VPH=1199</a></div><div class=""><br class=""></div><div class="">The article explains it pretty good.</div><div class=""><br class=""></div><div class="">Ben</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 19 Jun 2020, at 03:45, Neil Harper <<a href="mailto:metadata@gmx.com" class="">metadata@gmx.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">i was playing my be----ger 'model d' yesterday with a midi keyboard, and<br class="">started thinking about how they keyboard on the original MiniMoog worked.<br class=""><br class="">it was basically a string of resistors, one between each key right? What<br class="">kept the pitch CV constant after you let go of the key?<br class=""><br class="">does it use a sample and hold here? the little i know about sample and<br class="">hold circuits, they all have a "droop" to them.<br class=""><a href="http://mysite.du.edu/~etuttle/electron/elect53.htm" class="">http://mysite.du.edu/~etuttle/electron/elect53.htm</a> says ~3mV/s, which<br class="">would get pretty noticeably flat after only a few seconds.<br class=""><br class="">i had a quick squiz at the schematic but couldn't see or understand the<br class="">relevant section.<br class=""><br class=""><br class=""><br class=""><br class=""><br class=""><br class="">--<br class="">/// Neil Harper<br class="">/// Every Wave is New Until it Breaks<br class=""><br class="">_______________________________________________<br class="">Synth-diy mailing list<br class=""><a href="mailto:Synth-diy@synth-diy.org" class="">Synth-diy@synth-diy.org</a><br class="">http://synth-diy.org/mailman/listinfo/synth-diy<br class=""></div></div></blockquote></div><br class=""></div></body></html>