Just connected a Apple EAC enabled set of ear fones to the tablet and found that:
The pause button works on the music tracks but the volume controls, up and down dont.

Additionally the pause button pauses video tracks but again no up/down volume.

Post this for information only, it may help someone.

Has anyone got a set of cans with better functionality for the tablet.
I see Bose have a set of cans saying Android compatible but at 150 euros its outside budget.