-----Original Message-----
From: kripto [mailto:
e.campus@...]
Sent: Wednesday, June 06, 2001 7:38 PM
To:
analogue@...Subject: Re: [AH] Re: jupiter 8 adsr
Luís Marka wrote:
>
> Hi,
> You probably have a blown ADSR generator chip. It's a custom
Roland
> IC, IR3R01.
> To be sure if this chip is really fried, you'll have to
measure the
> voltage in its output pin, and check if it's acting as expected (0 to
+10v,
> according to the envelope shape). If it´s OK, you´ll have to follow
the
> signal path until find out what´s wrong. I think it´s only possible
with
> schems at hand... you know, Jupiters are complex machines.
After initial panic, I've spent some time on the jupiter and I found
that my
initial description was uncorrect:
Is not true that no one of the adsr2 parameters works, cause if I set
the vca
control amount to max, than Release works as a sort of aftertouch, cause
the
overall volume is near zero, and also Attack works (I hear a little
progressive
increase of volume, not just the "click" that I got when Attack is set
to 0. I
think that probably even Decay works, but I can't hear it cause the too
low
volume...
So: it looks like only the Sustain doesn't work (only one voice)..
Do you still think that could be a faulty IR3R01.?
Suggestions welcome!
thanks
E.Campus