Reference; Utility Mode; Master Tune - Yamaha MU5 Owner's Manual

The Utility mode lets you set functions related to the overall operation of the
MU5, such as Master Tune, Transpose and Velocity settings. Included also are
utility operations, such as sending bulk data to a data storage device, and
initializing of the MU5 settings.

Master Tune

Range
Default
This determines the overall fine tuning of the MU5's Voices. It
also affects the pitch of the individual drum/percussion sounds of
the drum kits. Master Tune is especially useful for adjusting the
pitch of the MU5 when playing with other instruments. (The
actual pitch of each Voice depends also on the other pitch related
parameters: Transpose, Note Shift and Part Tune.)
32

Reference

Utility Mode

#
PART PGM
Not available Tuning value
+/- 100 cents
0
At around 440 Hz, 1 Hz is approximately equal to
NOTE
4 cents.
VOICE NAME