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

[Quincas Moreira]

Good ol LM741 perhaps?

On Mon 3 Apr 2023 at 18:54 brianw <brianw at audiobanshee.com> wrote:

> I'm not aware of any op-amp that are non-linear to the degree that it
> would be musical. The feedback pretty much serves to linearize the whole
> circuit.
>
> However, you can "fix" any op-amp by putting a couple of diodes across the
> input in a way that makes the output track the input in a non-linear way.
> My first guitar amplifier had diodes in the feedback of the op-amp (as
> opposed to across the +/- inputs) and that was capable of introduction a
> great deal of non-linearity, although perhaps a bit more than you're after.
>
> I don't have any circuits to share, but you'll probably have better luck
> designing something that is supposed to be non-linear, so you can use any
> decent op-amp, rather than make your product dependent upon a
> one-in-ten-thousand special op-amp.
>
> Brian Willoughby
>
>
> On Apr 3, 2023, at 2:18 PM, Neil Harper wrote:
> > 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.. :)
>
>
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Quincas Moreira
Director | QMA
mobile:  5534988825
site:  quincasmoreira.com
email:  quincas at gmail.com
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