Yeah, Laurie, a kind of!
You were right about your statement, actually, the implementations of the
touch response which came after the patents I mentioned ( mostly uspns
4018125 , 3816636 and 3626075 ) , reported a touch response as a derivative
function of the aftertouch , with FETs and OTAs combined to "sample" the
higest AT value you play on an estimated basis then keeping it and lowering
it to the velocity level value you set then havng the double advantage of a
sharp attack at high levels ( then also the "bump" when the waveform starts
to output ) which focuses also on the filters giving the piano or pluck
effect....
PS: My ex girlfriend loved aftertouch and varied pitch by sliding a finger
or two on her, you could start from 0Hz to high pitch.....happily she didn't
love velocity at all..... ;-)
M
----- Original Message -----
From: "laurie" <laurie@...>
To: <yamahacs80@yahoogroups.com>
Sent: Friday, May 19, 2006 1:41 AM
Subject: Re: [yamahacs80] CS80 touch reponse: mistery solved!!!
> Do you think this is there so you could overwrite a slow attack with
> aftertouch prior to the decay sequence and is this vector based as in
> +Change of CV is touch responsive and -Change of CV is touch
> irresponsive.......
>
> BTW....My girlfriend is exactly like this....When I touch her, her
> response is to peak at a high amplitude before I get cutoff and then she
> is in touch irrisponsive mode...with sharp punchy control....releasing
> me to hang with the transients.... thats why I still hang on to the ol
> eighty.....lol
>
> Max Fazio wrote:
>
> > Hi guys
> > Just to share with you this fantastic discovery: I had a new look
> > among the patents related to the GX1 and CS synthesizers and found
> > u.s.pn 3636232 and u.s.pn 3784718 relating to the touch response cv
> > circuit : the circuit acts as a double signal which encodes two types
> > of signals going into the same output:
> >
> > 1. a so-called "touch responsive" signal which provides a cv on a
> > level which could be both on amplitude and cutoff: the level isn't
> > just flat but has a decay of 1.5 seconds and a peak slightly higher
> > than the actual sustain level which becomes hearable when the level of
> > the touch responsive signal surpasses the sustain-cutoff level.
> >
> > 2. a so-called "touch irresponsive" signal which provides a sharp AR
> > envelope waveform which has a peak which is independent from the
> > velocity and relates to the first , attack transient, providing a
> > sharp , punchy amplitude cv to the controlled signal. Even though this
> > AR envelope is able o raise its amplitude peak along with velocity
> >
> > The combination of the two produces a combined cv that acts to give
> > the long sought after "natural" touch response: the AR of the t.i.
> > signal stays quiet under the touch responsive signal under acertain
> > velocity value, then , with high velocities it can raise up to a level
> > higher than the touch responsive signal then decaying down to the
> > touch responsive signal ( for itself the t.i. signal decays to 0 but
> > the combination of the two allows a kind of ADS(R) as the velocity's
> > CV
> >
> > This solves the mistery about my long debated "plucked" response on
> > certain presets.
> > What do youthink of this discovery? could it be recreated as an
> > encoder into a whatever keyboard??
> > M
> >
> > [Non-text portions of this message have been removed]
> >
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