[sdiy] The sound of various Op-Amps

[Michael Boracci]

Mr. Bissell
 This is why I had posed the question about the sound of certain Op-Amps, It
seems almost vital to have these components in some of your modules and
processors. I am seeing from the response that in some cases it may be
better to accept the faults of the less glamorous devices in order to savor
the unique qualities that made some of the most admired synthesizers and
processors.

 With regard to slew rate, is there a point where there is no additional
return in apparent audio quality? In Tape-Op magazine I read an article
about how some of the pro-audio preamps use video grade Op-Amps in an effort
to achieve the holy grail of unadulterated sound. It seems like a bit of
overkill to have that kind of speed when you are only dealing with audio
signals.

MB

-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of harrybissell
Sent: Friday, September 19, 2003 11:42 PM
To: Ken Stone
Cc: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] The sound of various Op-Amps


cha-ching
(yes Ken... you the man !)

The 741 is a much maligned opamp. It does have several very good points...
it does not have a very fast slew rate (so it will not OSCILLATE like a
TL07x
series does into a capacitive load - ask me cause it burned me again,
professionally...
just today :^).   It is very rugged and short circuit protected.  It will
NOT
phase
reverse so you can safely clip it just by overdriving the input.

Sometimes these are exactly the characteristics you want

H^) harry

Ken Stone wrote:

> >
> >741
> >
> >*ducks*
>
> Well, it's the sound of the early to mid 70's at least. A hell of a lot of
> equipment used them, simply due to the lack of any real choice.  Of
course,
> the 741 is the perfect op-amp for the D/A converter of the Digisound
VCDO -
> it's slew does all the filtering that is needed.
>
> Ken
> _______________________________________________________________________
> Ken Stone   sasami at hotkey.net.au
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>




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