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<p>Is cents really the proper way of looking at this verses absolute
frequency?</p>
<p>My thought is that absolute frequency should be the base and then
cents used to determine if the actual frequency is good enough to
not detect it being off.</p>
<p>Agree on auto-tuning. There will be a limit to the resolution you
need and most VCOs don't have perfect scaling so auto-tuning would
be a good idea.<br>
</p>
<p>Jay S.<br>
</p>
<div class="moz-cite-prefix">On 7/7/2021 2:44 PM, Tom Wiltshire
wrote:<br>
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<blockquote type="cite"
cite="mid:8A5C46B0-DA99-4D16-BFB6-8602F7CE1316@electricdruid.net">
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<div class="">On 7 Jul 2021, at 21:38, Mattias Rickardsson
<<a href="mailto:mr@analogue.org" class=""
moz-do-not-send="true">mr@analogue.org</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div dir="auto" class="">
<div class="">
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Jay Schwichtenberg
via Synth-diy <<a
href="mailto:synth-diy@synth-diy.org" class=""
moz-do-not-send="true">synth-diy@synth-diy.org</a>>
skrev:<br class="">
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Very
simple solution for this.<br class="">
<br class="">
Just like for a regular VCO have a course and fine
tune DAC, maybe 12-14 <br class="">
bits for the course and 8-10 bits for the fine. Just
make sure they are <br class="">
decent DACs, especially that they are linear.</blockquote>
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<div dir="auto" class=""><br class="">
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<div dir="auto" class="">Not only linear, but super
precise - the 14-bit coarse DAC would need to have a
precision corresponding to 24-bit resolution. Would you
find such a product?</div>
<div dir="auto" class=""><br class="">
</div>
<div dir="auto" class="">I always tend to lean towards
using PWM or R-2R for the lowest bits of such hybrid CV
DACs, but optimal solutions may vary…</div>
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</blockquote>
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<div>You wouldn’t need such extreme precision if you had feedback
from the final pitch output to the quantizer that is generating
this CV. You’d hen have an “autotune” system that was capable of
microtonal playing, and all it would need would be an accurate
way to measure the incoming pitch, and a load of big look-up
tables of all the scales it could play.</div>
<div><br class="">
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<div>But again…at this point it’s just screaming DIGITAL!</div>
<div><br class="">
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<div>Tom</div>
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