Kurzweil Flash Play PC4 Musician's Manual page 281

Song Mode
The TRACK Page
Transpose
Use the Transpose function to change the MIDI Note numbers of the selected Note events.
Semitone: -128 to 127 semitones
An increment of one semitone represents a change of one MIDI Note number. You can
transpose Note events only within the range of MIDI Note numbers 0 to 127.
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