[sdiy] Discrete Op Amps

[cheater00 cheater00]

Modern op amps might have better gbw, noise, etc, but older op amps
(discrete or not) might have characteristics that you desire. For example,
they might clip or sag in a specific way that is desirable. The thing is,
that sort of thing is mostly inaudible on simple sounds - the more complex
a sound the more "magic" you can work. So on the voice mixer - yes. On an
instrument effect, mixer channel, etc. Last op amp of a synth voice, maybe.
Vca, maybe. Op amp after filter, or in filter, maybe. Vco mixer before vcf
is pushing it. Before that don't bother. There's a place for them and if
your budget allows them, go wild. However most synths contain very many op
amps so making them expensive could easily spiral out of control.

On Sat, 8 Apr 2017 13:31 Gordonjcp, <gordonjcp at gjcp.net> wrote:

> On Sat, Apr 08, 2017 at 05:45:35AM -0500, Elain Klopke wrote:
> > Here's a question that's surprisingly not related to my Organ Donor
> module
> > project.
> >
> > Discrete op amps are kinda a big thing in recording electronics DIY, but
> do
> > they have a place in SynthDIY or are they best left for people making
> > preamps, compressors, EQs, and mixers?
>
> Under all possible circumstances - even preamps for the golden-eared
> audiophools - discrete opamps will be outperformed in every respect by even
> the cheapest shittiest IC.
>
> You should read Rod Elliot's article on discrete opamps, and build the
> circuit he suggests.  It won't perform well but it will give you a much
> better understanding of how proper opamps work.
>
> http://sound.whsites.net/project07.htm
>
> --
> Gordonjcp MM0YEQ
>
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