■61 keys Keyboard oriented to GS-GM Midi compatibility with a simplified synthesis edit.
■main (mask) CPU H8/532 part of manages up to 24 voices polyphony with a 16 bits DAC UPD6376GS.
A JV-30 tone is composed by one or various PCM multisample - internal samples cannot be really edited just like previous classic digital model Roland U-20. Internal ROM (3 X IC) wavetable features 445 tones (317 GS + 128 drums) or samples at 16 bits resolution mainly derived from classic Roland Canvas SC-55. Each tone offers 8 variations presets ready to go, easily accessible from panel. JV sounds are organized in instruments families (eg: brass, piano, orchestral) mostly bread and butter sounds
■ system manages up to 16 parts each and some parameters:
- volume mix + effects send
- fat mode: stacks 2 voices and adds a panning position
- octave add 1 octave lower layer
- dual: 2 different tones on a layer
- split defines 2 zones for split play
- solo mode (monophonic)
- transpose: up to 12 tones
- panning position
■ FILTER classic resonant filter with single cutoff parameter.
■ LFO a simple delayed vibrato modulation with 2 parameters: + adjustable frequency rate + depth amount
■ EFFECTS DSP offers 2 engines A-B:
- ENGINE A: 8 chorus models: classic, flanging and short delay
- ENGINE B: 8 reverb models: hall, plate, delay and room.
■ MIDI good implementation for its time: exclusives systems that can access to all in-deep edit parameters.
■ MEMORY: 8 performances + 128 ROM preset tones + 128 RAM slots + 9 ROM + 9 RAM drum kits.; sounds can be saved by Midi sysex | Battery replacement: CR-2032 in battery holder.
■ ->JV30 FACTORY RESET: PRESS CHORUS + REVERB (ABOVE INIT) THEN PRESS VALUE UP