[sdiy] Discrete Op Amps

[Elain Klopke]

In that case, I'll just leave them to my 500 series lunchbox and send the
outputs from the synths to that before they hit the audio interface.

On Sun, Apr 9, 2017 at 12:05 AM, cheater00 cheater00 <cheater00 at gmail.com>
wrote:

> 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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