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<p>Just for simulation proof of concept and to highlight the sin/cos
relationship. In practice you can pick E96 resistor values with
similar ratios.</p>
<p>- Oren<br>
</p>
<div class="moz-cite-prefix">On 12/15/20 3:35 PM, Didier Leplae via
Synth-diy wrote:<br>
</div>
<blockquote type="cite"
cite="mid:F7778759-94C4-4D54-9B8F-CA5DF79D20E9@yahoo.com">
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<div dir="ltr">Out of curiosity, why 7.07k resistors? That seems
like such a specific value</div>
<div dir="ltr"><br>
<blockquote type="cite">On Dec 15, 2020, at 3:27 PM, Mattias
Rickardsson <a class="moz-txt-link-rfc2396E" href="mailto:mr@analogue.org"><mr@analogue.org></a> wrote:<br>
<br>
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<blockquote type="cite">
<div dir="ltr">
<div dir="auto">
<div dir="auto">Douglas Self shows this connection as the
first example in the Passive Panpots subchapter of his
Small Signal Audio Design book, with the description
<div dir="auto">"... has several disadvantages, not least
the poor offness when panned hard over, caused by the
current flowing through the wiper contact resistance to
ground."</div>
<div dir="auto"><br>
</div>
<div dir="auto">The rest is left to the reader, but thanks
to separated L/R channels with law-bending resistors,
the story ends well. And most of you have already
figured out that the next subchapter is even better. ;-)</div>
<div dir="auto"><br>
</div>
<div dir="auto">/mr</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Den tis 15 dec. 2020
19:34David G Dixon <<a
href="mailto:dixon@mail.ubc.ca" rel="noreferrer
noreferrer" target="_blank" moz-do-not-send="true">dixon@mail.ubc.ca</a>>
skrev:<br>
</div>
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.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div><font size="2" face="Arial"><span>Hey Team,</span></font></div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><font size="2" face="Arial"><span>I've been
thinking about this panning thing, and I came up
with the following very simple pot-based panning
circuit:</span></font></div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><font size="2" face="Arial"><span><img alt=""
src="cid:893392018@15122020-2191"
data-unique-identifier=""
moz-do-not-send="true" hspace="0" border="0"
align="bottom"></span></font></div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><font size="2" face="Arial"><span>The gain
responses of this circuit are shown below, and
compared with sin and cos responses:</span></font></div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><font size="2" face="Arial"><span><img alt=""
src="cid:893392018@15122020-2198"
data-unique-identifier=""
moz-do-not-send="true" hspace="0" border="0"
align="bottom"></span></font></div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><font size="2" face="Arial"><span>I believe that
I can create a voltage-controlled version of
this simple pot panning circuit fairly easily by
replacing the pot with a pair of modified Irwin
2164 circuits. I did this for the Morphing LFO.</span></font></div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><font size="2" face="Arial"><span>Would this
response suffice as an "equal power" panner?</span></font></div>
</div>
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<div><SimplePanner.png></div>
<div><PanPlot.png></div>
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