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Roland Alpha Juno 1

 

 

 

Roland Alpha Juno 1
info Country: Japan
Weight: 5,4 Kg
Dimensions: 802 x 240 x 79 mm
audio demo trend price : 200€
manual demo demo video comments

 

Roland Alpha Juno 1 (1985)

 

The last of the Classical "Juno" series, an interesting hybrid analog & digital characteristics with Midi interface and memory.

 

main
DCO

info KEYBOARD 49 keys (no velocity).
The main panel features an LCD display, 38 buttons and a data wheel "Alpha Dial"; on the left side a joystick that acts as both pitch bender and modulation function.

Rear panel terminal connectors:
- Midi interface
- tape interface
- main signal out
- headphones out
- expression pedal assignable to volume / aftertouch / velocity
- assignable pedalswitch: patch up / portamento / chord memory on-off
- hold pedalswitch input.

 

 

edit VOICE main CPU Intel 8032AH manages 6 voices polyphony.
Each voice has an assigned DCO oscillator based on custom Roland IC MB87123PG and each DCO is composed 2 summable waveforms + 1 sub oscillator + 1 noise generator:


cpu

Waveform Harmonic variations: Level width: range:
pulse 3 - yes (3rd shape) 4' 8' 16' 32'
saw 5 - yes (3rd shape) 4' 8' 16' 32'
suboscillator 5 yes - 1 / 2 oct below
white noise 0 yes - -

 

waveform oscilloscope
Alpha juno 1 on vaccum-tube oscilloscope

 

 

filter FILTER multimode VCF based on 6 X IR3R05 IC (also VCA):
- lowpass at -24dB/Oct : with resonance that does not reach auto-oscillation
- highpass: 4 scaled values.
The VCF also provides a 15-levels keytracking system.

filter VCF


IC filter




adsr LFO
a single delayed modulator and 2 destinations with individual depth values:
- LFO to DCO pitch
- LFO to DCO VCF filter.

LFo





adsr ENVELOPE
a single 4-stages + 3 time levels with polarity inversion EG assignable to:
- DCO pitch
- VCF filter cutoff
- VCA amplitude with special gate mode
In addition the VCA provides a 15-levels keytracking system.


DCO EG

 


adsr
PERFORMANCE some special functions:
- octave transpose keyboard
- portamento
- chord mode learn (it outputs Midi)
- bender range 1 octave setting
- key transpose
- 15 aftertouch levels (by Midi IN) assignable to VCF / DCO / VCA.
MIDI some basic CC# are managed including: modulation, foot control, portamento time
and hold


alpha juno explained


fxEFFECT section features an analog stereo chorus based on MN3101 + MN3009 IC like Juno-60 or Jx-3p with adjustable rate


chorus

BBD

 


memory MEMORY:
- 64 ROM presets
- 64 RAM slots.
Sounds must be saved to magnetic tape or Midi exclusives data dump
BATTERY REPLACMENT : change lithium battery model CR-2032 soldered to the mainboard.


solder battery


Roland Ju1 mainboard



edit EDIT main panel lacks many real-time commands, but there are many computer software or it is possible to use the dedicated optional programmer model PG-300.
- VST AU Alpha JUNO Editor (MAC-PC / $$) PIC
- Midiquest (MAC-PC / $$) PIC
- MKS-50 (Atari ST / freeware now) PIC
- CTRLR (MAC-PC-LINUX / free) PIC
- Alpha BASE (PC / free) PIC
- Alpha Juno Control (MAC / free) PIC below.



alpha juno editor



family RELATED MODELS :

Alpha Juno 2 Alpha Juno 2

ALPHA JUNO1 VS ALPHA JUNO2:

Ju2 is bigger with 5 octave keyboard velocity and aftertouch sensitive keys
MKS-50 MKS-50 rack unit with some enhancements like Detuning, Portamento and a double RAM memory.
HS-80 HS-80 consumer version of alpha Juno2 with different outfit.
HS-10 HS-10 - an alpha juno1 with different case.

PG-300

PG-300 programmer compatible with all the JUNO series.


 

effet VST PLUGIN / SAMPLED VERSION there are some free and commercial samples set:

  name price link demo
EFM Oddse PHUTURA free VST emulation
effet phutura vst
audio oddy SMC Joono VST free VST emulation effet SMC Joono VST
odsay REDOMINATOR commercial VST plugin effet redominator



demoAUDIO DEMO

demo SANXION (track overdub) with TR-606
demo Performance 1 + drum samples
demo Performance 2 + drum samples
demo Performance 3 + drum samples
demo Performance 4 + drum samples
demo Performance 5 + drum samples
demo Performance 6 + drum samples
demo Organ: b3 even more poor
demo Harpsichord: like a 8 bits
demo Piano: analog poor
demo Clavinet: naaaa
demo Bass: funky
demo Bass: mooga
demo Bass: razor
demo Bass: jumpy
demo Bass: soft quiet
demo Bass: attack
demo Drums: analog kit
demo Drums: timpani
demo FX: scary ohhhhohhhh LOL
demo Ambient: chill
demo Ambient: space
demo Ambient: system
demo Pad: murky
demo Pad: chorus
demo Pad: time bandit
demo String: LFO movement
demo String: very simple
demo Synth: WOOObled
demo Synth: what's a hoover?
demo Synth: Drill
demo Synth: droning
demo Synth: melodie d'amour
demo Synth: rate by rate
demo Synth: resonance up
demo Synth: square world
demo Synth: slippery when dry
demo XP: waveforms all pulses
demo XP: suboscillators waves
demo XP: sawtooth width
demo XP: pulse width
demo XP: white noise and filter
demo XP: lowpass and resonance
demo XP: highpass mode filter
demo XP: LFO all shapes
demo XP: Chorus BBD


effet Soundcloud Alpha Juno1

demo1 3 tracks 3 tracks


video VIDEO CLIP SELECTION

Roland Alpha Juno 1 Roland Alpha Juno Techno Demo Track Alpha Juno 1 Hoover
demo1 Techno Demo Track Hoover

 

 

roland aplha juno pic
Alpha juno with mimi the synthcat




manual
ROLAND ALPHA JUNO 1 MANUAL

 

 

 




Roland Ju1 service manual
SERVICE MANUAL

 

 

 

 


manual
FACTORY PATCH

 

 


original scan

 

 

original scan

 

 

 


Roland Alpha Juno 1 For sale:

Roland Alpha Juno 1 For sale:
CHECK OUT EBAY OFFERS

 

 

 

 

roland epom demo alpha juno motherboard


manual

-Juno
- weird DCOs

-price

manual

- edit is painful
- limited EG / LFO

comment

REVIEW "A near classic ! Still a little good analog with good basses .The oscillators have something weird and digital. Try it before buying, it can be a cheap source of worthy analog sounds. "

 
alpha juno logo
COMMENTS

 

 

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roland alpha juno1 3.5 out of 5 based on 27 ratings. price €200