Adjusting The Volume Balance Among The Keyboard Playing, Ensemble Sound, Software Playback, And Microphone's Input - Yamaha Disklavier Mark IV series Operating Manual

Chapter 4: Basic Piano Playing
3 Play the Disklavier.
The Acoustic mode is silenced and the digital piano sound is heard only from the
connected headphones.
Note:
the two headphones should be of the same model.
Adjusting the Volume Balance among the
Keyboard Playing, Ensemble Sound, Software
Playback, and Microphone's Input
Tap on
1
34
appears.
Two sets of headphones can be connected simultaneously. In this case,
on the Function bar.
Headphone mode indication
Balance control display
[Reset] button