All about the Roland Jupiter-series

From: xxxxxyyy1666 
Sent: Friday, August 25, 2000 11:41 PM
Subject: [AH] Juno / Jupiter oscillators


Hi

I have a question about the number of oscillators on Juno and Jupiter 
synths.

I've seen the Junos described as having one DCO and the Jupiters described 
as having two VCOs. For instance, in an old mail from 1995 to Analogue 
Heaven which I found in Mark Pulver's archive I read that "the 6, 60, and 
106 had a single oscillator and a single envelope (with a built-in chorus 
serving to fatten up the sound), while the Jupiters had two of each.".

From what I've seen of the Jupiter-8 it seems logical that it had two VCOs 
providing eight voices. However, I don't understand how for instance the 
Juno-106 can have only one DCO. Even if it doesn't have many modulation 
routings, it's got selectable pulse, saw, sub and noise oscillators which 
provide six voices each. Doesn't that mean that it actually has four 
oscillators providing six voices each?

I must have misunderstood something, it would be great if somebody could 
clear this up for me.

Best wishes

xxxxyy111
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From: Tony Allgood
Sent: Friday, August 25, 2000 10:54 PM
To: Analogue Heaven
Subject: Re: [AH] Juno / Jupiter oscillators


>I've seen the Junos described as having one DCO and the Jupiters
described as having two VCOs.

The Juno has one DCO per voice, thats six in all. The Jupiter-6 has two
VCOs per voice, thats twelve VCOs in all. The JP-8 has eight voices each
with two VCOs... mmm, nice 16 in total. More to go wrong though.

Each VCO or DCO may well produce several waveforms at the same time,
although only one is usually allowed to be heard at any one time.

Regards,

Tony Allgood  Penrith, Cumbria, England

Modular synth circuits, TB303 clone and Filter Rack
www.techrepairs.freeserve.co.uk/projects.htm
My music: www.mp3.com/taklamakan