Roland VE series
The Roland VE (Voice Expansion) series is a line of expansion boards designed for certain Roland JV series keyboard synths and certain Roland A series MIDI controller keyboards. Unlike most other expansion board products from Roland, these boards contain an entire tone generator (synth module) on a card, thus providing enhanced capabilities and more polyphony to the devices they are installed in, not just additional patches or samples.
Models
Roland VE-GS1
The Roland VE-GS1 voice expansion board has a Roland GS-compliant synthesis engine with 28-voice polyphony and 226 normal instruments,[1] comparable to the Roland SC-50 (no CM-64 compatibility banks). It is compatible with the JV-35, JV-50, JV-90, JV-1000 and A-90.[1]
Roland VE-JV1
The Roland VE-JV1 voice expansion board has the synthesis engine from the Roland JV-1000, with 512 preset patches and 28-voice polyphony.[2] It is compatible with the JV-35, JV-50, JV-90, JV-1000 and A-90.[2] When installed in the JV-1000, it can load JV-1000 part settings via a SysEx bulk dump, but it can't load "internal" or "card" data.[3]
Roland VE-RD1
The Roland VE-RD1 voice expansion board "add[s] functions as a stage piano" to the Roland A-90.[4] The manual claims is not compatible with any other device.[4]
Roland VE-GS Pro
The Roland VE-GS Pro voice expansion board has the "sound device functions" of the Sound Canvas SC-88 Pro (including 64-voice polyphony, reverb, chorus, EQ, multi-effects, etc.).[5] It is compatible with the A-90, A-70 and MC-80.[5]