If you play a piano,your left hand is providing the bass and rhythm chords and moving all the time as you play..With an arranger you must make a chord by holding down keys in a designated area of the keyboard. This will trigger the autoaccompaniment section which will then play a background based on the chord and allows you to play a melody in the right hand.Ideally,your left hand should remain on the notes....holding them down.
If you want to learn to play piano,get a RD-700SX or a Yamaha P-140.
If you want to have fun and play for a hobby or amusement...get the PSR-3000.
I was referring to a module version of the PSR-3000 as something I wish they would make.


Ian