Rhodes Chroma by lucasasdelli
The Rhodes Chroma is a wonderful piece of hardware; it comprises full analog audio generation and path (XR4151 VCOs, Curtis filters and VCAs) and a clever digital control part.
The instrument could be virtually patched in 16 different ways, like as with a modular synth; the 16 voices could be arranged as 16x1VCO, 8x2VCO, unison, arpeggio modes. Ring modulation and sync are present. VCFs could work either as 2-pole or 4-pole, LPF or HPF.
A new CPU board (named CC+) is currently available to overcome to several limitations and to add native MIDI interface with SysEx. An optional alphanumeric display could be connected, to make editing far easier and immediate. Even with CC+, an external controller like Behringer BCR-2000 could be used to adjust the various parameters in a much easy way.
The instrument could be upgraded with a polyphonic aftertouch kit, and its electronic implementation is present as factory on all units.
The eight DVB (dual voice boards) are quite prone to fault, mainly due to component age, and some early CMOS ICs are quite often to be replaced. The Power Supply unit is the most failing part, but a kit (SPSU) is available as drop-in replacement.
The wooden keyboard doesn't present any piano-like feedback articulation, but simply it's a pleasure to play.