Laurie
Well, the waveform generator has 8∗2 of them into the cs80 so it
is likely that there is one waveform generator per note...I believe
that this behaviour takes advantage of:
1. the keyboard mechanics (
close relates to the CP-30 electric piano ) which feature long legs
making it even more sensible , even if I don't remember where the
velocity sensors are
2. the exponential CV of the aftertouch which
allows dramatic changes with low aftertouch force on the fingers
Therefore it happens that you are playing an aftertouch only keyboard
really, a very good one for the truth and the velocity acts there along
with the aftertouch: low velocity= low aftertouch, meaning low level
sampling and then no initial transient,high velocity=high aftertouch,
where the circuit samples the level you reach at the maximum speed ,
then , according to the velocity sensitivity, it lowers the amplitude
of the cv to the level set with the "initial" sliders, therefore ,
through this "muting" you get both the initial transient and the
velocity level...it's like a fusion of velocity and aftertouch
together!
BTW, I'll follow your advice abotu the girl, even if I can
always activate the wah-wah but without the chorus active, otherwise I
could wake up the neighborhood!!!
M
----Messaggio originale----
Da:
laurie@...Data: 19-mag-2006 3.49 PM
A: <yamahacs80@yahoogroups.
com>
Ogg: Re: [yamahacs80] CS80 touch reponse: mistery solved!!!
When
you say this ,it makes sence to sample/hold the top most pressure
with
one key......I find you can apply more pressure on a single key
than on
a key within a chord as your strength gets more evenly
distributed
across the hand with a chord....If the hold time didnt
exist, playing
a loud melody and then adding notes in the same hand
would cause a drop
in effect of the AT you are trying to maintain on
that note....Pretty
clever but...
Is it possible to hit that "hard" velocity without
causing some AT
happening......I thought when I pounded down to cause a
high velocity
occurrence my inertia would add aftertouch briefly to the
note causing
an extra amplification around the attack time....would
this slight hold
of my initial AT be in play as the decay portion
commences??? thus
causing the bump or is this circuit actually
modifying the attack time
which is set with the envelope?????
BTW if
you try to use too much single fingering on the G.F while in
irresponsive mode.......you end up with a lot of time for intimate full
hand clusters.....:o
Max Fazio wrote:
> 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]
> > >
> > >
>
-----------------------------------------------------------------------
>
> > > YAHOO! GROUPS LINKS
> > >
> > > + Visit your group
"yamahacs80" on the web.
> > >
> > > + To unsubscribe from this
group, send an email to:
> > > yamahacs80-unsubscribe@yahoogroups.
com
> > >
> > > + Your use of Yahoo! Groups is subject to the
Yahoo! Terms of
> > > Service.
> > >
> > >
>
-----------------------------------------------------------------------
>
> > >
> >
> >
> > [Non-text portions of this message have been
removed]
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
> >
>
>
>
> SPONSORED LINKS
>
Music sampler
Unit Sampler
>
-----------------------------------------------------------------------
> YAHOO! GROUPS LINKS
>
> + Visit your group "yamahacs80" on the
web.
>
> + To unsubscribe from this group, send an email to:
> yamahacs80-unsubscribe@yahoogroups.com
>
> + Your use of
Yahoo! Groups is subject to the Yahoo! Terms of
> Service.
>
>
-----------------------------------------------------------------------
>
[Non-text portions of this message have been removed]
------------------------ Yahoo! Groups Sponsor --------------------~--
>
Get to your groups with one click. Know instantly when new email
arrives
http://us.click.yahoo.com/.7bhrC/MGxNAA/yQLSAA/QnLolB/TM
--------------------------------------------------------------------~-
>
Yahoo! Groups Links
yamahacs80-unsubscribe@yahoogroups.
com
com/info/terms/