[sdiy] Fast envelope follower circuit needed..

[David G Dixon]

Yes, 3dB of signal attenuation is root(2)/2, or 70.7%. 

> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl 
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Tristan
> Sent: Saturday, March 30, 2013 3:32 PM
> To: synthdiy diy
> Subject: Re: [sdiy] Fast envelope follower circuit needed..
> 
> A 3dB attenuation actually approximates a halving of the 
> signal power, as power is related by the square of the 
> amplitude. Changing a 6 volt signal to 12 volts is an 
> approximately 6dB increase in amplitude.
> 
> /Tristan  
> 
> On Sun, Mar 31st, 2013 at 3:43 AM, Paul Anderson 
> <wackyvorlon at me.com> wrote:
> 
> > To add to these comments, the cut off on most filters is 
> often defined 
> > at the point of 3dB of attenuation. 3dB roughly equates to 
> a doubling 
> > or halving of amplitude. So a 3dB increase on a 6 volt 
> signal makes it 12v.
> > 
> > Filters look very simple, but the theory is surprisingly complex. 
> > 
> > Sent from my iPhone
> > 
> 
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