Prototype A.S.M.R.

Coming in Patch 11.1.

Representing the pinnacle of goblin propaganda technology, Gallywix commissioned the Automatic Sonic Machine Resonator to sway his most stubborn critics.

Riding Requirements:

Level 10
Apprentice Riding (ground)
Expert Riding (flying)

Source:

Chrome King Gallywix in Liberation of Undermine.

Notes:

This flying sound system has a chance of dropping from Chrome King Gallywix in the Liberation of Undermine raid on any difficulty.

Travel Mode:

Ground (+60% or +100% speed)
Flying (+150%, +280% or +310% speed)

Speed depends on your riding skill.

More info on Wowhead:

Prototype A.S.M.R. taught by Prototype A.S.M.R.