Laurie
No, it's my usual doubt with the EXP pedal...
Anyway I should have understood something, let'see if I got it....
-Among the exp circuit the Vactrol tube has a big importance , not just because it is driven by the pedal but because it seemingly has a relationship with the general volume or the fundamental frequency of the VCOs
-This relationship can justify why with lower notes the sound seems more "filtered" : the Vactrol
has a less emission of light when the volume is low, therefore being the low notes perceived at a lower volume than high notes , the filter network would be driven by the Vactrol even with no pedal CV going on, to get that kind of Loudness compensation.
-So the filter network in the exp circuit are definitely NOT fixed and they track the keyboard , although with regards to the volume...
Hope I was right...
PS: sorry Juergen , you were right but I had to realize these things myself.....
M
----- Original Message -----
From: laurie
To: yamahacs80@yahoogroups.com
Sent: Saturday, September 02, 2006 5:06 AM
Subject: Re: [yamahacs80] Please, anybody HELP!!!
Im not sure what you are asking Max ...are you talking about the
"Wah"pedal circuit???
Max Fazio wrote:
> Hi guys....how can it be possible that nobody here can speculate
> anything about this expression circuit??
>
> OK, there is this famous 3rd filter into the EXP circuit, it's made of
> a couple of 3dB lopass filters forming a 1pole lowpass for a gentle
> filtering; I don't know why the low notes sound filtered and the high
> notes have not this impression, why if you slide down with the ribbon
> you plainly get an effect of tracking even if you aren't applying any
> key tracking, why if you put in some resonance into the master
> fitlers, this effect retains part of this resonance.....
> Guys, anybody can give me a little hand or address me wherever I can
> get these infos??
> Please help!!!
> Max
>
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