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<p>More complex than an op-amp - use a sheet-beam tube as per Ken
Stone's 4BN6 beam modulator module
<a class="moz-txt-link-freetext" href="https://sdiy.info/wiki/Audio_synthesis_via_vacuum_tubes/Using_sheet-beam_tubes">https://sdiy.info/wiki/Audio_synthesis_via_vacuum_tubes/Using_sheet-beam_tubes</a><br>
</p>
<div class="moz-cite-prefix">On 04/04/2023 22:43, Kylee Kennedy via
Synth-diy wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CADD61nWS-N_cv0VhcpEjUUw6X_LWd1_eQO1gdMTYigC4F_sLpw@mail.gmail.com">
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<div dir="ltr">My vote is also to go old school tube op-amp
<div><a
href="http://www.philbrickarchive.org/applications_manual_for_philbrick_octal_plug-in_computing_amplifiers_1956to1961.htm"
moz-do-not-send="true" class="moz-txt-link-freetext">http://www.philbrickarchive.org/applications_manual_for_philbrick_octal_plug-in_computing_amplifiers_1956to1961.htm</a><br>
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<div>If for some reason the audio isn't warmer the room will be
in a few hours.</div>
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<div>Kylee</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Apr 4, 2023 at 7:45 AM
Chris McDowell via Synth-diy <<a
href="mailto:synth-diy@synth-diy.org" moz-do-not-send="true"
class="moz-txt-link-freetext">synth-diy@synth-diy.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div style="overflow-wrap: break-word;">Thirded! Tanh lookup
is tasty. An OTA is essentially the same thing, but more
laborious to tune.
<div><br>
</div>
<div>
<div><br>
<blockquote type="cite">
<div>On Apr 4, 2023, at 9:37 AM, Chris Rogers via
Synth-diy <<a
href="mailto:synth-diy@synth-diy.org"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">synth-diy@synth-diy.org</a>>
wrote:</div>
<br>
<div>
<div dir="ltr">
<div dir="ltr">On Tue, Apr 4, 2023 at 7:33 AM <<a
href="mailto:rburnett@richieburnett.co.uk"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">rburnett@richieburnett.co.uk</a>>
wrote:<br>
</div>
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Is the
digital effect your own design? If so, why
not experiment with <br>
additional digital processing to generate the
warmth you're after.<br>
<br>
-Richie,<br>
</blockquote>
<div><br>
Seconded -- e.g. the tanh function provides a
nice warm gain-dependent distortion, and can
be easily implemented as a lookup table.</div>
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