I've talked about this model before, and it is an arranger. It was made by Roland quite a few years ago. I'm not sure how the sales were for it though. I've gotten some emails about it so here's the link with some info. They are a pretty rare beast at the moment--rather hard to find them.

GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.