[sdiy] Automatic gain correction for Overdrive

[Fortner Florian]

Thanks for the many replies!

I found an application note to the proposed NE570 circuit here:

www-eu4.semiconductors.com/acrobat/ applicationnotes/AN175.pdf 

Looks quite usable, I am going to try this circuit as soon as possible
(although the NE572 is a rather expensive chip, at ~6$)

regards,

flo

-----Original Message-----
From: Studio 271 Productions
To: synth-diy at dropmix.xs4all.nl
Sent: 17.05.02 02:04
Subject: Re: [sdiy] Automatic gain correction for Overdrive

Yeah...
Don't know if anyone reads it, but i sub to a mag called Nuts and 
Volts (http://www.nutsvolts.com), and it recently had a good sized 
article on this IC and subject (Feb 02 issue). I wish I could scan 
the article for someone, but I have no way of doing that. Hope this 
info helps ya...

-Drewish (could be my name?)

>Florian,
>
>What you want is a 'flattener' Its a circuit which
>detects the level of the input signal, then adjusts
>the output level to match. You can proably use an
>NE570 compander IC to do this.
>
>--TR
>
>--- Peter Snow <psnow at magma.ca> wrote:
>>  Hi Florian,
>>
>>  Something that may interest you is a circuit from
>>  Electronic Musician, January 1987 call the
>>  "Fuzzstain".
>>  It used a CLM6000 to provide a sort of compression
>>  that smoothed out the sound level as the fuzz
>>  increased in gain.
>>  I never built the device but I have a rather poor
>>  jpg of it I can send you if you're interested.  If
>>  you can wait a while, I may be able to find the
>>  whole original article and scan it all for you (if
>>  the mice haven't eaten it!).
>>
>>  Cheers,
>>
>>  Peter
>>
>>
>>  Fortner Florian wrote:
>>  >
>>  > Hello everybody,
>>  >
>>  > I wonder if this has ever been discussed (then
>>  please recap it for me :-P ):
>>  > How can I cope with the strong loudness change in
>>  an overdrive circuit? If
>>  > you turn up an analog Overdrive it gets far
>>  louder, so you have to play with
>>  > the volume knob all the time. Is there any common
>>  approach? One can perhaps
>>  > do it with an additional VCA, but I'd like a
>>  method where the gain reduction
>>  > can be integrated with the overdrive. If anyone
>>  ever has done this I would
>>  > be happy to hear from him!
>>  >
>>  > regards,
>>  >
>>  > flo     (at the moment still learning and only
>>  asking nasty questions, but a
>>  > VERY BIG FAN OF THIS GREAT LIST!!!)
>
>
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