[sdiy] Envelope follower w/ control voltage proportional to perceived loudness?

[DAF]

I should have mentioned - I am using this for a stand-alone guitar
processing pedal, not in a synth.

Dave


----- Original Message ----- 
From: "Jason Proctor" <jason at redfish.net>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, August 18, 2007 9:43 PM
Subject: Re: [sdiy] Envelope follower w/ control voltage proportional to 
perceived loudness?


> #pragma knee_jerk_reaction
>
> patch the output of the follower to both the input and the CV input of an 
> exponential VCA
>
>
>
>>I am trying to use a guitar to generate a control voltage that is 
>>proportional to the *perceived* loudness of the sound, not the actual 
>>voltage envelope itself.  Would it make sense to try using a log converter 
>>after the envelope follower to get an overall voltage response closer to 
>>what the ear hears?  Has anyone tried using a linear-to-log converter 
>>after their envelope followers to generate a control voltage for this 
>>purpose?  I was thinking a circuit with matched transistors such as is 
>>used in analog synthesizers to make 1V/Octave response.  Would this work?
>>
>>thanks,
>>Dave
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