TECH main core IC H8/532 (Hitachi hd6435328f) system manages up to 28 voices polyphony or PCM TONES. DAC is a Burr Brown PCM69AP.
STRUCTURE a basic JV-80 patch is composed by 4 tones (or PCM samples) with individual settings:
stereo panning position
delay start time
- crossmodulation FXM Hear XFM on square
WAVETABLE inernal 4 Mb ROM contains 129 PCM samples at 16-bits resolution, mainly a wide selection of bread and butters for all kind of music and tastes.
The internal ROM can be expaned using either SO-PCM cards or SRJV cards.
||The ROM table is basically organized into 3 categories: acoustic, basic waves and drums
Hear ALL internal waves
EXPANSION the JV is expandable fitting 2 kind of expansions:
- PCM card inserted into the frontal slot (SO-PCM series 1/2 MB)
- SRJ-V board (usual size is 4 or 8 MB).
||SUPER SOUND SET
||KEYBOARDS OF THE 60's & 70's
||BASS AND DRUM
||SPECIAL FX Collection
||EXPERIENCE promotional board.
||EXPERIENCE 2 promotional board.
NOTE: There are 21 SR-JV available with different instrument styles, but only the first 3 were projected for JV80/880 series mainly for the structure algorithm and the EFFECT DSP that improved JV series with the following model JV1080.
SO-PCM1-01 Piano Selections
SO-PCM1-02 Guitar and Brass
SO-PCM1-03 Rock Drums
SO-PCM1-04 Grand Piano
SO-PCM1-07 Orchestral FX
Note: SO-PCM cards are also compatible with:
- Roland JD-990
- Roland JV1080
- Roland JD-800 (only PCM, not programs)
ENVELOPE each TONE features 3 EGs:
- EG1 AMP: segments + 3 times, 8 velocity curves + key follows option.
- EG2 FILTER: 4 segments + 4 times.
- EG3 PITCH: 4 segments + 4 times, Keyfollow + random Pitch ratio.
LFO up to 2 delayed low oscillators, 7 shapes with adjustable symmetry offset : triangle, sinewave, sawtooth, trapezoidal, random1 and random2 - sample-hold.
LFOs destinations are: TVF filter, TVA amplitude and stereo panning.
Some extra modulation functions are note retrig and sync to LFO.
FILTER digital resonant TVF - Time Variant Filter - provides 2 modes:
|| Hear Lowpass on white noise
Hear highpass on white noise
The TVF features also keyfollow function with
+/- 200% harmonic content cutoff over octaves.
PERFORMANCE the JV engine is multimbric and manages up 7 parts (+1 drum) parts each with assignable parameters:
Midi channel assign
keyboard zone assign
- variable tuning scale: equal, just and arabic.
- portamento set
- analog feel function
|| Hear two parts multitimbric (synth+bass)
Hear analog feel range
EFFECT digital DSP features basically 2 kind of effects that can be edited with minor parameters:
- reverb: 8 presets 2 ROOM, 2 STAGE, 2 HALL and 2 DELAY Hear
- chorus: 3 presets
of choruses/flanger with variable rate and depth Hear
- RAM 64 patches
1 rhythm set
- ROM 128 patches
- ROM 16
1 rhythm set.
TIP: RAM doubled using l Data card model Roland M 256 / M512.
EDIT some programmers for computer:
-Soundquest (MAC/PC, $$$)
- JV Tool (PC + Linux) FREE URL
MAINTENANCE I did personally had troubles with tact switches that were getting hard to push.
standard tact switches replaced!
* sequenced by Fabien Royer (could not contact him)