Roland DP-990 Owner's Manual page 3

Play back the demo songs
The DP-990 contains seven demo songs for each sound.
Play back the internal songs
The DP-990 contains 65 piano songs.
For the titles of the internal songs, refer to "Internal song list" (p. 97).
Play back parts separately
You can choose to have the right hand, left hand, or accompaniment part be played
back while you practice a different part.
Play back songs from a CD
By connecting a commercially available USB-compatible CD drive, you can use the
DP-990 to play back commercial music CDs or CD-ROMs that contain SMF music data.
Disable the panel buttons
You can enable Panel Lock so that the buttons will be inoperable. This is a convenient
way to prevent unintended changes in settings while you're performing.
Record your own performances
It's easy to record what you play. Such recordings give you an opportunity to
evaluate your own performances. You can also record each hand separately.
Save your performances
Songs you record can be saved in internal memory, USB memory (sold separately),
or on a floppy disk (sold separately).
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