Harmony

The Harmony function allows you to add to any (and every, if desired) of the L/R voices other automatically generated notes, in addition to (and/or in place of) the ones actually played. The added notes, to sound less prominent or even subtle, can have an optionally lower volume.

The automatically added notes can be at fixed intervals with the root (= actually played) note, or at intervals dependent on the played chord driving the auto accompaniment. In this case they will dynamically change with your left hand chord, even if you keep fixed the root note (= it is continually harmonized against a changing chords progression).

Some “black magic” behind the scenes will automatically coalesce the ever changing harmonized notes with the ones already in place, so that the final result is quite similar to an human written score, and hence perfectly credible.

The net result is a fully configurable enriched sound, that would be impossible to play by a single player. The obtained result can be as subtle or as bold as you desire, ranging from a fuller strings pad to a screaming big-band jazz quartet.

The factory OTSes of the built-in styles give some good examples. There, to be as general as possible, the harmony function is used sparingly and on the “subtle side”. But you can tweak it and make it very prominent.