Roland JX10 V3.0

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Roland JX10 V3.0

Postby Quavermass » Fri May 09, 2014 8:39 pm

The JX10 Finally gets a full MIDI spec that is fully compatible with the MKS70...no M64C required!!

I have spent the last 12 Months beta testing this software and details are at SuperJX V3.0.

All new software written from scratch by Fredric Vecoven and optimized for the onboard hardware,no soldering required.

Full MKS70 Midi spec with Tone A/B Editing.
Bulk Load/Dump without M64C cart...(Or you can Bulk Load/Dump to an M64C without disturbing the RAM).
C1/C2 Front panel sliders can Edit tone parameters and control pretty much anything when playing patches.
Editing with a PG800 will send sysex data out over MIDI for sequencing.
Patch change can send APR sysex data.
LFO Free run or Key Sync.
Many Midi parameters are On/Receive/Send/Off, for more flexible Master Keyboard duties.
Midi clock sync-able arpeggiator with 8 program slots (Replaces JX10 sequencer software).
Optimized code makes the whole synth more responsive to Playing and Front panel controls.


PWM+Major upgrade under development,Requires LOTS of Desoldering/Soldering..but available to MKS70 too !!
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Re: Roland JX10 V3.0

Postby commodorejohn » Fri May 09, 2014 11:22 pm

PWM? Holy c**p, I can't wait - that's the single biggest thing the JX-10 is missing.
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Re: Roland JX10 V3.0

Postby Rezisehtnys » Fri May 09, 2014 11:47 pm

Well, that and the LFO free run which he already has taken care of. Yes, PWM will be very nice indeed though. What would be cool is if the envelopes and filter could somehow be adjusted.
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Re: Roland JX10 V3.0

Postby Quavermass » Sat May 10, 2014 2:45 am

The software for the envelopes resides in the B and C ROMS...which are under Frederic's microscope during the PWM Re-Write....If there are any possible tweaks to remove the misfiring and tighten things up in software the discovery/fix will be made in this particular prototyping stage.

Just so everyone knows the Assigner Rom code was Re-Written first as a proof of concept and the 8031 code that runs on the soundboard CPU's was bug fixed/re-timed and recompiled to run on faster 80C320 chips and Is almost identical to the Roland Factory code (complete with any flaws).....this code is now being re-written for the faster chips and to add the PWM stuff....and...well other cool stuff TBA
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Re: Roland JX10 V3.0

Postby Rezisehtnys » Sat May 10, 2014 5:20 am

I've always wanted a JX-10 just due to my love for the JX-8P, if it gets at least PWM I'll have to run out and buy one for sure.
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Re: Roland JX10 V3.0

Postby Aaron2 » Mon May 12, 2014 9:34 pm

How does this differ from Colin Fraser's JX-10 ROM? In other words, hasn't this already been done?
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Re: Roland JX10 V3.0

Postby Rezisehtnys » Tue May 13, 2014 1:20 am

^That one only addresses MIDI, this one does such and then some.
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Re: Roland JX10 V3.0

Postby max badwan » Tue May 13, 2014 1:49 am

commodorejohn wrote:PWM? Holy c**p, I can't wait - that's the single biggest thing the JX-10 is missing.

I agree, you can do PWM of sorts using sync, but it's not the same. I never could figure why Roland engineers put PWM in the Junos and Jupiters, but not the JXs. No doubt cost.
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Re: Roland JX10 V3.0

Postby Rezisehtnys » Tue May 13, 2014 2:34 am

They didn't want it to sound too massive, yes that's it. I don't buy cost, look at all of the features it did have. Implementing PWM wouldn't have really cost much more as it'd be more a matter of software than hardware per se.
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Re: Roland JX10 V3.0

Postby commodorejohn » Tue May 13, 2014 4:09 am

I've gotten the impression from some of Gordon Reid's writings that PWM at that time was considered mostly a poor man's way of getting a detuned-second-oscillator "thick" sound - hence its inclusion on the MS-10 but absence on the MS-20, for example. But then again, it was present on pretty much all of the famous two-oscillator polys (including Roland's own Jupiters,) so maybe not...?
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Re: Roland JX10 V3.0

Postby Rezisehtnys » Tue May 13, 2014 4:44 am

Though the JX has two oscillators with chorus. Who knows, maybe they did it as to not potentially hurt Jupiter and Juno sales. Regardless hopefully this fix is out soon as the JX is one of my favourite synths and it'd just be the icing on the cake so to speak.
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Re: Roland JX10 V3.0

Postby commodorejohn » Tue May 13, 2014 4:52 am

Except that the JX-10/8P were supposed to be the new flagship line replacing the Jupiters...you'd think if anything they'd want to make sure it didn't lack any features the Junos had so that people wouldn't be tempted to go the cheaper route...huh. Well, as long as it finally gets added ;)
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Re: Roland JX10 V3.0

Postby Quavermass » Tue May 13, 2014 5:46 am

According to Fred Vecoven all the control switching for extra sample and hold CV stuff is already on the soundboards, so the Roland engineers may have had PWM in mind at during the design phase.....however the 8031 CPUs on the soundboard are running near flat out to run the synth as it stands , adding in a faster CPU late in the design/prototype stage may have been too costly back then?? (With the DX7 killing off synth companies at a fast rate).
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Re: Roland JX10 V3.0

Postby Rezisehtnys » Tue May 13, 2014 7:06 am

For some reason I was thinking the Jupiter was made longer than it was, though counting the MKS-80 I guess it was. Yeah, limited CPU would make sense given the envelope speed. Anyhow, this is probably one of the more exciting things for me as I could really care less about MIDI and what not.
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Re: Roland JX10 V3.0

Postby Quavermass » Fri May 23, 2014 9:26 pm

PWM prototype boards have aririved here.......will wait for HD webcam to make a vid of the install

New stuff to beta test

2x Alpha Juno style Envelopes....Loopable
2x ADSR JX10 Envelopes....Loopable
Extra LFO
LFO both have Saw/Ramp waveform added
LFO 1/2 X-Mod for extra chaos or real long evolvoling pads etc....
PWM mod with LFO ENV or X-MOD goodness
Midi CC NRPN control of all parameters.....

Buy JX10 NOW !!!!!!! Before others find out


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