[sdiy] Discrete Op Amps

[Elain Klopke]

maybe that's another module to work on after I'm done with the Organ
Donor...

On Sun, Apr 9, 2017 at 1:54 AM, cheater00 cheater00 <cheater00 at gmail.com>
wrote:

> It doesn't exactly do the same thing. For example, putting an op amp of
> the right character right after the vcf might do really good things. Give
> it a try if you can.
>
> On Sun, 9 Apr 2017 07:58 Elain Klopke, <functionofform at gmail.com> wrote:
>
>> 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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