Roland KR107 Owner's Manual page 94

Chapter 5 Recording and Saving the Performance
Track buttons assignments for recorded performances
Performances that have been recorded using Automatic Accompaniment are
assigned to the track buttons as shown below.
Track button
[R/Rhythm]
[1/Whole]
[2/ Bass
Accomp]
[3/Lower]
[4/Upper]
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Performance Recorded
The rhythm part of an Automatic Accompaniment is
recorded here. In addition, drum sets and effect sounds
that are selected with the keys in a performance are
recorded to this track.
When using Piano Style accompaniment (p. 62), the
performance played on the keyboard is recorded here.
The Automatic Accompaniment bass part and
accompaniment part are recorded here.
When the KR is set so that sounds from performances on
the left-hand side of the keyboard are played while the
Automatic Accompaniment sounds (p. 61), your own
performance on the left-hand side of the keyboard is
recorded here.
Your own performance on the right-hand side of the
keyboard is recorded here.
Music Styles are composed of
eight parts. For details, refer to
"Music Styles and Automatic
Accompaniment" (p. 47).