Yamaha CS80

> What I told about high frequencies was a try to understand better what 
> Juergen said about his view of kind of a "bug" inside the cs80, that is some
> of the processed signal from EXP circuitry went into the bypassed signal 

No, no, no. I was talking about the Volume pedal function, built around
PH1 and PH2. That's not a bug, or leakage of anything bypassed, that's a
straight, intentional implementation of a "Loudness" volume control.


> know that EXP adds loudness to the signal but I speculate this is not the
> case because ( I come back to the beginning ) because the signal should have
> been enhanced all over the place 

I don't know if the Loudness function explains the effect you are looking for.
I just gave a hint to include this in your search.
But in general, when your harmonic content changes with pitch, you *do* look
for a fixed filter (as opposed to a tracking filter), and the Loudness filter
network falls in that category.

JH.


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