Audio Issues HP EliteBook Tablet G1 with 810 Revolve UltraSlim Dock Station

Hello,
 
I am using a HP EliteBook Tablet G1 with 810 Revolve UltraSlim Dock Station.
 
The sound from the headphone jack output in the PC is OK, but when you connect the headphones to the dock output the sound is not good. I downloaded the last drivers but dindn't work.
 
Thank you!