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Subject: FW: [AH] Re: jupiter 8 adsr

From: "Verschut, Ricardo" <ricardo.verschut@...>
Date: 2001-07-02

-----Original Message-----
From: Luís Marka [mailto:marka@...]
Sent: Wednesday, June 06, 2001 3:54 PM
To: analogue@...
Cc: 'e.campus@...'
Subject: [AH] Re: jupiter 8 adsr

> Date: Wed, 06 Jun 2001 02:18:58 +0200
> To: "analogue@..." <analogue@...>
> From: kripto <e.campus@...>
> Subject: jupiter 8 adsr
> Message-ID: <3B1D76F2.3A73F7BB@...>
> well, today my beloved jp8 made me cry.
> one of the voices doesn't respond to adsr2.... no one of the parameters,
> using memories or manual mode, no fun.
> somebody experienced this kind of things?
> thanks.
> E.Campus
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.