Bon ... je me réponds ! En fait c'est tout simple Dans le manuel page 70 :
3. Pad to Note Mode: Follow Pad Func, Sounds, Beats, Mutes—
Incoming MIDI Note messages can be used for playing the pads, triggering
sounds, selecting beats, or muting sounds. The 4 options are:
• Follow Pad Func: Incoming MIDI notes will control whatever is selected
by the Pad Function buttons, exactly like the pads.
• Sounds: Incoming MIDI Notes will always trigger sounds.
• Beats: Incoming MIDI Notes will always select one of the 16 beats.
• Mutes: Incoming MIDI Notes will always be used to mute/unmute the 32
sounds [16 each in banks A and B].