<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Deckard’s Dream and Kijimi [and probably Xerxes as well] tune each card just like you’re proposing with the digital solution. It’s digital control over analogue oscillators. The widely used STM is on board all of these afaik. A “listener” scheme listens for fader adjustment [there are over 80 values to listen to per patch]. Unfortunately due to non-motorized faders, you need to “wake up” each slider by adjusting each slider slightly to modify that part of the patch.<div class=""><br class=""></div><div class="">The software development is not trivial, and [most likely] may be outside the realm of your project.</div><div class=""><div class=""><br class=""></div><div class="">This may be obvious, but this should get you started thinking in this direction:<br class=""><div class=""><a href="http://www.rhodeschroma.com/?id=circuitdescriptions" class="">http://www.rhodeschroma.com/?id=circuitdescriptions</a></div><div class=""><a href="http://www.rhodeschroma.com/?id=tuning" class="">http://www.rhodeschroma.com/?id=tuning</a></div><div class=""><a href="http://prophet600.blogspot.com/2012/09/tuning-and-frequency-counting.html" class="">http://prophet600.blogspot.com/2012/09/tuning-and-frequency-counting.html</a></div><div class=""><br class=""></div><div class=""><br class=""><div class=""><div>Todd</div><div><br class=""><blockquote type="cite" class=""><div class="">On Jul 11, 2019, at 10:05 AM, ulfur hansson <<a href="mailto:ulfurh@gmail.com" class="">ulfurh@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="content-type" content="text/html; charset=utf-8" class=""><div dir="auto" class="">DCO’s might be a good enough solution, but also has a host of problems to work through on its own... are there any good modern DCO examples/implementations out there?<div class=""><br class=""></div><div class="">also - looks like korg figured out a way to pack the micros into a tiny enough space to be worth the trouble - i wonder how the new moog one handles tuning, perhaps a similar approach?<br class=""><div class=""><br class=""><div dir="ltr" class="">Sent from outer space</div><div dir="ltr" class=""><br class="">On Jul 11, 2019, at 13:28, Jacob Watters <<a href="mailto:jacobwatters@gmail.com" class="">jacobwatters@gmail.com</a>> wrote:<br class=""><br class=""></div><blockquote type="cite" class=""><div dir="ltr" class=""><div dir="ltr" class="">If you want to tune the oscillators continuously anyway, then why not use DCOs? The signal is still analog, and the pitch is perfectly controlled without the extra sampling and tuning code.<div class=""><br clear="all" class=""><div class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><font face="verdana, sans-serif" color="#444444" class=""><b class="">Jacob Watters</b></font><div class=""><font face="verdana, sans-serif" color="#444444" class=""><a href="http://jacobwatters.com/" target="_blank" class="">JacobWatters.com</a></font></div><div class=""><span style="color:rgb(68,68,68)" class="">Tel: 226-886-3526</span></div></div></div></div></div></div><br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jul 10, 2019 at 5:03 PM ulfur hansson <<a href="mailto:ulfurh@gmail.com" class="">ulfurh@gmail.com</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr" class="">hello list,<div class=""><br class=""></div><div class="">I have a really nice synth voice up and running on my bench, and have always dreamt of making my own poly.</div><div class=""><br class=""></div><div class="">all parameters are voltage controlled, but the tuning is... well... not perfect.</div><div class=""><br class=""></div><div class=""><div class="">currently I'm quite happy to omit oscillator FM, so in theory the oscillators would not "need" any modulation other than PWM.</div><div class=""><br class=""></div><div class="">autotune feels a bit archaic at this point, so i'm wondering - a tiny microcontroller listening for zero crossings should be able to adjust the frequency of each oscillator for near perfect tuning, no?</div><div class=""><br class=""></div><div class="">so far, i sadly haven't developed the skills required for digital solutions - but I wonder how crazy it would really be to implement something like this - can anyone think of a project / reading material that could help guide the way towards creating a tiny (preferably REALLY small) ADC/DAC listener circuit that could correct the resulting frequency of a sawtooth oscillator?</div><div class=""><br class=""></div><div class="">it would be amazing to put 8 of these voices together with perfect tuning without any divide down or stepped interval solutions...... but then again it would also mean i'd need at least 16 micros to listen to all the oscillators at once!!</div><div class=""><br class=""></div><div class="">any thoughts would be greatly appreciated, or even better yet - if someone would be interested in a collaborative effort, i'd be happy to send hand soldered smd prototypes between continents if necessary!</div><div class=""><br class=""></div><div class="">many thanks,</div><div class="">-úlfur</div><div class=""><br class=""></div>-- <br class=""><div dir="ltr" class="gmail-m_-8012538369394566095gmail_signature"><div dir="ltr" class=""><div class="">•</div><div class=""><a href="http://ulfurhansson.com/" style="color:rgb(17,85,204)" target="_blank" class="">ulfurhansson.com</a></div><div class=""><a href="http://cargocollective.com/ulfur" style="color:rgb(17,85,204)" target="_blank" class="">cargocollective.com/ulfur</a></div><div class=""><a href="http://instagram.com/ulfur_" style="color:rgb(17,85,204)" target="_blank" class="">instagram.com/ulfur_</a></div></div></div></div></div>
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