Could it be something like this?
(according to the 'correct' algorithm in
https://www.beis.de/Elektronik/Correlation/CorrelationCorrectAndWrong.html )
import("stdfaust.lib");
correlate(l,r)= l*l,r*r,l*r:sqrt,sqrt,_:*,_:/ :_;
correlate_meter(x,y)=
x,y<:x,attach(y,(correlate:hbargraph("corr",-1,1))):_,_;
process= _,_:correlate_meter:_,_;
I am not sure about the lowpass filters though. Maybe not needed in the
digital domain?
Also, my code only returns -1 or 1 while it should be returning a range
of -1 and 1, right?
>
> The correlation is either expressed in % from -100% to +100% or as the
> correlation factor, which ranges from -1 to +1. Note that due to the
> correlation algorithm the level of both signals does not matter, i.e.,
> it does not influence the measured result.
>
> When a mono source is used for a stereo signal both stereo channels
> will be +100% correlated. When e.g. in a stereo signal both channels
> contain completely different signals, e.g. left (and only left) is the
> trumpet and right (and only right) is the guitar these stereo channels
> will be 0% correlated. With a third instrument appearing in both
> channels, the correlation will be somewhere between 0 and +100%.
>
Ideas?
Danke :)
Klaus
On 03.08.21 12:48, Klaus Scheuermann wrote:
> Hello List,
>
> I just wondered, if anyone has implemented a stereo audio correlation
> meter/analyser in faust?
>
> If yes - great!
> If no - I have another project :)
>
> Here is what I found about the algorithm(s):
> https://www.beis.de/Elektronik/Correlation/CorrelationCorrectAndWrong.html
>
> I never learned analog electronic schematics, but it seems it should not
> be extremely hard to transfer to faust.
>
> Cheers, Klaus
>
>
>
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