Recording Tempo Changes - Yamaha PSR640 Step By Step Procedures

Tempo changes can be recorded throughout a Song by changing the Tempo and
recording to a blank Track.
1) With a Song in Record mode, use the [BACK] and [NEXT] buttons to
display the 'RECORD MODE' screen.
2) Turn the Data Dial to select 'Multi Track'.
3) Press the [NEXT] button four times, to display the 'MODE' screen.
4) Select an empty Track by pressing one of the 16 buttons under the
screen.
5) Turn the Data Dial to the right, to select 'REC' next to the selected Track.
6) Press the [NEXT] button once to display the 'Recording>' screen.
7) Press the [START/STOP] button to start the Song playing.
8) Press the [TEMPO/TAP] button.
9) While listening to the Song, turn the Data Dial to select a desired Tempo
in the screen.
10) Press the [EXIT] button.
11) Press the [NEXT] button once to display the 'RECORDING' screen.
12) Press the red [START/STOP] button to start the Song playing. The
Tempo last selected will be recorded.
13) To change Tempo as the Song is playing, press the [TEMPO/TAP] button
and turn the Data Dial.
14) When all desired Tempo changes have been made, press the
[START/STOP] button to stop the Song.
15) Press the [+/YES] button to save the Song to the floppy disk.
Owner's Manual, p. 96-97
VIII. Recording Tempo Changes