Yamaha MM8 Owner's Manual page 24

Playing Patterns
4
Play a left-hand chord to start the pattern.
If you don't yet know how to play any chords, try playing anything you
like on the keyboard. Refer to page 25 for information about playing
chords.
The accompaniment will change according to the left-hand notes you
play.
5
Play a variety of left-hand chords while playing a melody
with your right hand.
6
Press the [START/STOP] button to stop pattern playback
when you're done.
You can switch pattern "sections" to add variety to the accompaniment.
Refer to "Pattern Variations (Sections)" on page 51.
24
MM6/MM8 Owner's Manual
Split Point
Split Point
Auto-accompani-
ment Range