From: hatter@cs.utexas.edu (John Eichenseer)
Newsgroups: rec.music.synth,rec.music.makers.synth,austin.forsale,misc.forsale
Subject: For Sale: Roland JX-10 Keyboard (price reduced)
Date: 9 Nov 1992 10:58:47 -0600
Organization: U Texas Dept of Computer Sciences, Austin TX
Distribution: world
NNTP-Posting-Host: cash.cs.utexas.edu

I thought I would post once more. If I don't sell the JX within about two 
weeks, I will be forced to trade it in at Rogue in New York...

*****
Roland JX-10 (Super JX) anaolg synthesizer, 76-note velocity-sensitive 
keyboard. Good MIDI controller, great analog sound. Excellent condition, 
with manual, road case, and extra sound cartridges. 

Asking $600 OBO. As far as I can tell, this is a really good deal, 
especially with a good road case. 

Knock off another $50 if you don't want the case. 

I will append a more detailed description below; Send e-mail or call if 
interested. 

Regards,
	John Eichenseer
	hatter@cs.utexas.edu
	(512) 458-6474
	
The Super JX uses a standard DCO-VCF-VCA voice architecture, with two
oscillators per voice. The DCO's can do some cross-modulation and syncing,
which is nice for pseudo-FM effects and so on. There is one LFO and two
envelopes per voice, and these can modulate parameters of the DCO's, filter,
and amplifier. There is a chorus setting at the VCA level, which introduces
some very smooth and expansive chorusing. 

The voices are organized into two tomes, uppper and lower (like on a D-50).
Each tone is a six-voice synthesizer (for a total of 12 voices, or 24
oscillators). A program can be set up to play in single voice mode, where
both tones play the same patch with 12-voice polyphony. Or, both tones can
play simultaneously (with detuning, transposition, etc) to layer or double
sounds with 6-voice polyphony. Finally, there are a couple of mono modes,
which let you play single voices, or even stack all 24 oscillators into
one massive monophonic voice. 

The sound is versatile, ranging from punchy analog synth basses and lead
lines to extremely smooth strings and brass. With its layering capabilities,
you can create some very D-50-sounding voices... just add reverb. The JX 
has a distinct character of its own, however; several of its programs are 
industry classics (the famous "voices", for example). There are a wide 
variety of third-party companies that sell programs for the JX-10; the 
classified ads of KEYBOARD magazine list several. 

The 76-note keyboard feels good; not as mushy as some of Roland's later
keyboards (like the D-50). The aftertouch takes some serious pressure to
engage; I think that there is a mod to fix this. Aftertouch can modulate 
vibrato, volume, and filter cutoff. 

There is a rudimentary sequencer on board. Record and play back, variable
tempo, no editing. There is also a "chase" function, which delays the 
attacks of the two tones in various ways, and can make them echo back
and forth across the stereo field. 

There are five audio outs, a headphone jack, two switch pedal and two 
continous pedal inputs, MIDI in-out-thru, and a jack for a PG-800 
programmer. 

If you have any specific questions or comments, I would be happy to answer
them... 

-john

Newsgroups: rec.music.synth