Hmmm...... a canned, repetitive, pre-arranged backing track triggered in real time vs. an exact, solid, recreation of an existing arrangement on MP3 or sequenced, while the player has the ability to embelish at will using two hands to comp the same way we do in a live band ...... tough choice. I use both methods, but I think it's even more believable when I play my own bass lines, piano chords and sing the melody.

In essense ... "WE" are the arrangers, and we use all sorts of tools to enhance our performance of the melody, whether sung or played on an instrument. In short - the arranger is all the "stuff" behind the melody.