<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="">In a very similar vein, I did a VC-version of the BigMuff control using a single OTA. This appears in the Frequency Central Meth Amp module.<div class=""><br class=""></div><div class=""><a href="https://electricdruid.net/wp-content/uploads/2015/06/VCBigMuffTonecontrol.jpg" class="">https://electricdruid.net/wp-content/uploads/2015/06/VCBigMuffTonecontrol.jpg</a></div><div class=""><br class=""></div><div class="">BTW, thanks for that EDN link, Phillip. I’d never seen the maths for these circuits before.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 21 May 2020, at 01:44, dougall <<a href="mailto:dougalli@gmail.com" class="">dougalli@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">There is a voltage controlled implementation of a tilt eq in the delay section of the Shruthi Yellow Magic edition...</div><div class=""><br class=""></div><a href="https://mutable-instruments.net/archive/schematics/Shruthi-Analog-LP2Delay-v02.pdf" class="">https://mutable-instruments.net/archive/schematics/Shruthi-Analog-LP2Delay-v02.pdf</a> <br class=""></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 21 May 2020 at 06:08, Phillip Gallo <<a href="mailto:philgallo@gmail.com" class="">philgallo@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=""><div dir="ltr" class=""><br class=""></div><div class="">Maybe you've seen this EDN Design Idea:</div><div class=""><br class=""></div><div dir="ltr" class=""><a href="https://www.edn.com/implement-an-audio-frequency-tilt-equalizer-filter/" target="_blank" class="">https://www.edn.com/implement-an-audio-frequency-tilt-equalizer-filter/</a></div><div dir="ltr" class=""><br class=""></div><div class="">p</div><div dir="ltr" class=""><br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 20, 2020 at 7:06 AM Tom Bugs <<a href="mailto:admin@bugbrand.co.uk" target="_blank" class="">admin@bugbrand.co.uk</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">There's also a bit in Doug Self's Small Signal book - pages 269-271<br class="">
Very slightly different circuit-wise - he also terms it 'tone-balance' <br class="">
or tilt.<br class="">
<br class="">
Best, Tom<br class="">
<br class="">
On 20/05/2020 13:35, Paul Perry wrote:<br class="">
> Rod Elliott has this covered. Section 10 on this page:<br class="">
> <a href="https://sound-au.com/articles/eq.htm" rel="noreferrer" target="_blank" class="">https://sound-au.com/articles/eq.htm</a><br class="">
><br class="">
> paul perry Melbourne Australia<br class="">
><br class="">
> ------ Original Message ------<br class="">
> From: "ulfur hansson" <<a href="mailto:ulfurh@gmail.com" target="_blank" class="">ulfurh@gmail.com</a>><br class="">
> To: "synth-diy mailing list" <<a href="mailto:synth-diy@synth-diy.org" target="_blank" class="">synth-diy@synth-diy.org</a>><br class="">
> Sent: 20/05/2020 10:22:46 PM<br class="">
> Subject: [sdiy] “tilt” circuit<br class="">
><br class="">
>> hello list,<br class="">
>><br class="">
>> i have been wanting to elaborate on a synth master output stage for a while, and these strange times have cleared up space for prototyping time...<br class="">
>><br class="">
>> i have been thinking about a “tilt” circuit that could shift weight between volume on a hipass and lowpass circuit, effectively making it brighter or darker as you turn a single knob.<br class="">
>><br class="">
>> of course an xfade with a hi/lopass derived from an svf could be the answer, but it seems rather huge for a simple idea - are there any simpler ways to achieve this that come to mind?<br class="">
>><br class="">
>> hope you all are safe and well,<br class="">
>> -ulfur<br class="">
>><br class="">
>> Sent from outer space<br class="">
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