[sdiy] what opamp for "warmth"? (I know, I know...)

Rob Kam robkam at gmx.com
Wed Apr 5 12:57:30 CEST 2023


More complex than an op-amp - use a sheet-beam tube as per Ken Stone's 
4BN6 beam modulator module 
https://sdiy.info/wiki/Audio_synthesis_via_vacuum_tubes/Using_sheet-beam_tubes

On 04/04/2023 22:43, Kylee Kennedy via Synth-diy wrote:
> My vote is also to go old school tube op-amp
> http://www.philbrickarchive.org/applications_manual_for_philbrick_octal_plug-in_computing_amplifiers_1956to1961.htm
>
> If for some reason the audio isn't warmer the room will be in a few hours.
>
> Kylee
>
> On Tue, Apr 4, 2023 at 7:45 AM Chris McDowell via Synth-diy 
> <synth-diy at synth-diy.org> wrote:
>
>     Thirded! Tanh lookup is tasty. An OTA is essentially the same
>     thing, but more laborious to tune.
>
>
>>     On Apr 4, 2023, at 9:37 AM, Chris Rogers via Synth-diy
>>     <synth-diy at synth-diy.org> wrote:
>>
>>     On Tue, Apr 4, 2023 at 7:33 AM <rburnett at richieburnett.co.uk> wrote:
>>
>>         Is the digital effect your own design?  If so, why not
>>         experiment with
>>         additional digital processing to generate the warmth you're
>>         after.
>>
>>         -Richie,
>>
>>
>>     Seconded -- e.g. the tanh function provides a nice warm
>>     gain-dependent distortion, and can be easily implemented as a
>>     lookup table.
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