Giovanni, as you may know, the Roland FR-7 accordion is all digital and when played alone plays a wide range of sampled sounds thru its onboard amp/speaker system. When the FR-7 accordion is connectd to its foot pedal unit, it can then be connected to the Genesys XP with both a midi cable and left and right 1/4-inch mono cables. In this way, the FR-7 is a midi controller and its internal sounds are amplified thru the XP. So far, I have set the XP to the accordion 1 setup, with the right hand on channel 1, the bass on 2 and chords on 3. I have only used the preset styles and corresponding instrument settings defined in the presets and play along in arranger mode, with the FR-7 playing whatever sounds I set from its sound banks. The use of an arranger module is all new to me and I'm still early in the learning curve. As far as Glenn Miller styles, have you loaded the USER styles that came with the installation CD? There is a Miller Band style that has some really good presets.