Roland HS-10
Synthplus 10 (1987)

 

Consumer version of the famous ALPHA JUNO technically the same with different outfit.

Quite a rare version !

KEYBOARD 49 keys with no velocity.
The main panel features an LCD display, 36 buttons and a data wheel "Alpha Dial". On the left side a joystick that acts as both pitch bender and modulation functions.

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 on-off / chord memory
- hold pedalswitch input.

 

 

VOICE CPU Intel MCS-51 P8032AH manages up to 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:

 

WAVEFORMS OSCILLATOR DCO DETAILS:

wave 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 - -

HEAR waveforms all pulses HEAR suboscillators waves HEAR pulse width HEAR sawtooth width

 

FILTERFILTER multimode VCF based on 6 X IR3R05 IC (also VCA), the VCF also provides a 15-levels keytracking system.

- lowpass at -24dB/Oct : with resonance that does not reach auto-oscillation - highpass: 4 scaled values

LFO a single delayed modulator and 2 destinations with individual depth values:

- LFO to DCO pitch - LFO to DCO VCF filter. HEAR LFO all shapes

ENVELOPE a single 4-stages + 3 time levels with polarity inversion EG-
In addition the VCA provides a 15-levels keytracking system

- DCO pitch - VCF filter cutoff - VCA amplitude with special gate mode

 

PERFORMANCE monotimbric synth with 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.

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

HEAR chorus mode on/off

 

MEMORY:
- 64 ROM presets
- 64 RAM slots.
Sounds must be saved to magnetic tape or Midi exclusives data dump

ABOVE: BATTERY REPLACEMENT - change lithium battery model CR-2032 soldered to the mainboard.

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 / now freeware ) PIC - CTRLR (MAC-PC-LINUX / free) PIC - Alpha BASE (PC / free) PIC - Alpha Juno Control (MAC / free)

RELATED MODELS :

Alpha Juno 1 same as HS10 with different case.	Alpha Juno 2 5 octave velocity and aftertouch sensitive keyboard	HS-80 consumer version of alpha Juno2
MKS-50 rack unit with some enhancements like detuning, Portamento and a double RAM memory.	PG-300 programmer compatible with all the JUNO series.

 

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

	PHUTURA SMC Joono VST	free VST emulation
	REDOMINATOR	commercial VST plugin

AUDIO DEMO

Performance 1 + drum samples Performance 2 + drum samples Performance 3 + drum samples Performance 4 + drum samples Performance 5 + drum samples Performance 6 + drum samples Organ: b3 even more poor Harpsichord: like a 8 bits Piano: analog poor Clavinet: naaaa Bass: funky Bass: mooga Bass: razor Bass: jumpy Bass: soft quiet Bass: attack Drums: analog kit Drums: timpani FX: scary ohhhhohhhh LOL Ambient: chill Ambient: space Ambient: system

Pad: murky Pad: chorus Pad: time bandit String: LFO movement String: very simple Synth: WOOObled Synth: what's a hoover? Synth: Drill Synth: droning Synth: melodie d'amour Synth: rate by rate Synth: resonance up Synth: square world Synth: slippery when dry XP: waveforms all pulses XP: suboscillators waves XP: sawtooth width XP: pulse width XP: white noise and filter XP: lowpass and resonance XP: highpass mode filter XP: Chorus BBD

 

VIDEO SELECTION demo1 Techno Demo Track Hoover

 

 

SPECIAL AWARDS: