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

Tom Wiltshire tom at electricdruid.net
Tue Apr 4 11:12:41 CEST 2023


Yeah, I was going to suggest an OTA too. I suppose a differential pair might be another option (basically the input curve from an OTA).

The LM13700 is one of the few chips that I would say actually has "a sound", and that sound is definitely vintage.

Tom


> On 3 Apr 2023, at 22:34, Chris McDowell via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> You could use an OTA like the LM13700. They're pretty noisy and clip softly! Will certainly "old up" your sound some. 
> 
> Chris McDowell
> 
>> On Apr 3, 2023, at 4:18 PM, Neil Harper via Synth-diy <synth-diy at synth-diy.org> wrote:
>> 
>> i know this is going to be controversial, and I'm grabbing my popcorn..
>> 
>> i have a digital effect that I'd like to "warm up" in the last dry/wet mixing and output buffering stage. So wondering if there's any choice of opamp that might give some favorable non-linearity quality to the output sound. Would be running them with a single supply +9V.
>> 
>> as for what specs constitute "warmth", I'll leave that up to you.. :)
>> 
>> 
>> 
>> -- 
>> /// Neil Harper
>> /// Every Wave is New Until it Breaks
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> 
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