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Roland JX-3P



roland jx3p synthesizer
roland logo

audio demo trend price :300-400€
manual   demo video comments

ROLAND JX-3P (1983)

Affordable analog polyphonic synthesizer with memory and Midi interface.

PPP : "Programmable, Preset and Polyphonic " - Roland advertising.

the italian queen!

multi waveforms

info KEYBOARD (weight: 10 Kg ) 61 keys.
Main panel features 38 buttons, 3 sliders and a data entry slider
On the left side there are a pitch bender with a 3-range switch and a button for LFO modulation retrig.

Back panel terminal connectors:
- footswitch sustain input
- clock input for sequencer
- stereo output jacks (3 impedance levels)
- tape interface
- Midi interface

edit VOICE core is a 8-bits CPU Intel 8051 manages 6 voices of polyphony.
Each voice is composed by 2 DCO digital controlled oscillators.

filter trimmer

OSCILLATORS the DCOs are a bit different:

range 16' 8' 4' 16' 8' 4'
waveforms saw / pulse /square saw / pulse /square /noise
tuning - fine + coarse
cross mod - 2 modes
volume mix balancing DCO1 Vs DCO2 balancing DCO1 Vs DCO2

filter FILTER
based on IC IR3109.
The VCF is multimode similar to bigger model Juno-60:
- lowpass resonant at -24 dB lowpass
- highpass non-resonant highpass

.filter trimmer

filter trimmer

lfo LFO a single delayed oscillator and 2 destinations:
- DCO pitch
- VCF cutoff with
The modulator offer 3 shapes: square, saw and sample & hold.
Modulation can be set to free mode or retriggered pushing the appropriate button

ENVELOPE a single EG model 4-segments ADSR controls 2 sections:
- VCA amplifier with switch betweenEG / gate mode.
- VCF filter
Although the EG is shared, both VCA and VCF have individual EG polarity inversion.

single stereo analog chorus circuit has some BBD model Panasonic MN3009 and MN3101.

sequencer SEQUENCER
each patterns holds 16 steps (max 128) with some edit facilities like Fill, Note insert (up to six) and Pause step. Definitely very intuitive and really easy to use.

SYNC tempo can be synched to external analog trigger by a +5V pulse signal.

midi MIDI
implementation accepts basic messages like NOTE ON or OFF and systam cannot use both Midi and PG-200 programmer at the same time .. the big rip-off

memroy MEMORY holds:
- 32 RAM patches
- 32 ROM patches
If you have some troubles storing your sounds, you should check the internal battery (model CR1) which is soldered to the board

MODIFICATION some third part company like ORGANIX produced a new set of hardware OS that expands the original Midi protocol adding a full spectrum of control changes for each parameters plus Midi Sysex handling.

roland jx3p internal


pg200 - PG200 is the dedicated controller. Wired with a custom six pins cable, the parameters data are quick, but not recordable.
pg200 MKS30 rackmount version - some technical enhancements but it does not sound quite the dreaded 80017A found on Juno 106
custom original scan
JX3p custom models (click to enlarge)



Name: price system VIDEO URL
Vst Plugin Jv3P free PC-MAC LINK LINK
UVX 3p samples 99$ PC-MAC LINK LINK

jx3p vst


audio demo and cat mimi

track 4 by RWA MUSIC


cloud sound Soudcloud JX-3p

beethoven cloud2 cloud1


JX-3P Sound Demo Adventures with the Roland JX-3P Roland JX-3P and PG-200
Sound Demo Adventures with PG-200

roland jx3p

wiseman tips:

The forth hidden LFO waveform "Noise Random" is available only by direct JX3P edit (not by PG) pushing "4"




OS It is reporter that some later OS supports the velocity input parameter, but Jx3p can be updated only by installing EPROMS.

filter trimmer


original scan



original scan


A guy destroys a JX3p

! not for the faint-hearted




lfo waveforms vcf filter


-good filters
- Sequencer


- cannot use Midi and pg200 at same time
- EG


"Good polyphonic for modest budget and Midi is handy! programming is a bit uncomfortable but
sequencer is just great"



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all snapshots*, sounds, texts copyright Polynominal.com / Eric Pochesci
*but "desktop jx3p" "orange juice"- unknown authors.

roland jx3p 4.5 out of 5 based on 31 ratings. price €300