X

XG
Yamaha’s version of the Roland GS enhancement the General MIDI protocol that provides additional patch banks and editing capability.

XLR
This term describes a variety of audio connectors that use 3 or more conductors encased in an outer shield.

Xylophone
A percussion instrument set up in the form of a keyboard whose bars are made of wood. Played using mallets.

I've never missed a gig yet. Music makes people happy, and that's why I go on doing it - I like to see everybody smile.”
  Buddy Guy