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nice to talk to you as well flatpicker. just some tek stuff ive found that might save you some hassle. ...for mic pre's and other audio circuits.
having tried every op amp there is.
i keep on returning to the op37 for mic pre's.
different vendors op37's do sound a bit different. for some reason. for some reason as well - and i'm talking sound quality
here in particular the maxim max437 is one of the best i ever tried.
(they will send you a free sample if your nice to them).
also the motorola 33171 op amp seemed to work well in some app circuits (not mic pre's).
also what ive found is the lowest voltage noise op amps seem to loose "something" i cant put my finger on. very clinical i find.
one TIP is ive find through trying tons of op amps is .....
look at the current noise rather than the voltage noise.
ive found low curreent noise really in an op amp makes a big difference in the mic pre.
overall i prefer the op37 varieties to the old 5532.
what i do is i have a standard "mic front end pre circuit"
i can plug new op amps into. a test bed as it were.
the only downfall to the op37 is the "juice" they need in terms of ma's. which has given me a problem as ive been trying to design a portable mic pre. so i used high quality transistors for this.
using a 9 v battery. i would like to use a micropower op amp. but as yet have failed to find one i like. one of the best audio transistors ive found is a mpsa18. from motorola.
very sweet sound to it. also some of the nte newer low noise transistor parts. only draw about a milliamp so a 9 v batt lasts
quite a time.
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