Op-amp heresy.....

[brad sanders]

>went through the rest of the modules over the course of the next month
>or so doing it to all the 741's in there. There was one module where he put
>the 741's back though. The audio mixers. He reckoned that with a TL071 it
>was just a bit too clinical whereas with 741's it became somehow warmer.
>That has got to be some sort of distortion effect, but it was a marked 
>effect, you could hear it on tape easily. Maybe we shouldn't be in too much
>of a hurry to bin the old horrors after all.

I agree, to some extent. I was going to wax on about this (warning: I
have a lingering background in the lunacy that is "high end audio")
but was afraid I might be taken a bit too ... "odd" - amongst my peers
in this forum. 

In fact, this is why I'm always open to trying "new" opamps. Even the
cheapest and lowest performance devices can have their uses in
instruments. High IMD opamps (like especially most of these "slow" low
voltage opamps) can add a LOT of "body" to an instrument.

The only problem is many of these old synths have dozens of these
noisy things. If you have one 741 on the output or buffering the VCOs,
where the signal is relatively high, it's not a problem - but if it's
buffering a VCA ladder (for example) you're really just injecting a
bunch of noise for nothing. 


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