Is it possible to change the sound applied to the [X-PAD] without producing the [X-PAD FX] sound?
Yes.
The sound can be selected without producing it by pressing the [X-PAD FX] button while pressing the [HOLD (MUTE)] button.
Yes.
The sound can be selected without producing it by pressing the [X-PAD FX] button while pressing the [HOLD (MUTE)] button.