Yamaha GW50 Owner's Manual page 44

Finally, you can even change the bass note.
First, simultaneously hold [CHORD] and
press [on/ROOT].
Next, press the Chord button corresponding
to the desired note (written above the button).
Press it repeatedly until the note you want is
shown in the LCD.
For example, to use C as the bass note, press
[C/C ] until the "/C " is shown.
Try pressing other buttons now as the rhythm
plays to change to other bass notes.
To cancel this bass note and have the bass
line automatically change with the root note
again, hold [CHORD] and press one of the
Chord buttons to reselect the chord type.
You can also use the chord section func-
tions to assign chords to the Pedal
Switches. (See page 78 for details.)
HINT
9.
To stop playing the pattern, press [START/
STOP] again (or Pedal Switch 5).
You can also have the pattern stop with a
special ending pattern. To do this, first press
the ASSIGNABLE Block Pedal Switch to
switch to BACKING CONTROL.
... then press the End Pedal Switch (Pedal
Switch 4) while the pattern is playing.
GUIDED TOUR (TUTORIAL)
BACKING SECTION
35