The powerful Songbook feature besides the Tilt display, Sliders, & TC Helicon VH are the main reasons I switched back to another Pa4x as a performance arranger kb it certainly is Top of my list and beyond. it is some of the main reasons I switched back to Korg not to mention great styles & sounds..

If I'm not mistaken, and I may be at this stage of the game, Solton and then Ketron used the l+r sounds as presets (performances) without attaching styles from the MS series through earlier SD series arranger modules and keyboards.