Just installed BIA HH and when I start the game I get audio at the UBI soft and Gear splash screens but once the game starts I have zero audio.

When looking at the AUDIO option in the menu the master volume is all the way to the left and cannot be changed. I slide it to the right and it will automatically slide left again.

Hi Kalski. I read about your problem in another thread.
I think your problem is a joystick connected to your PC. Maybe even a Logitech Extreme 3D Pro USB? That is the one I have got and it's the same with every Unreal Engine game. When it is plugged in the player is constantly turning left, in the options screens sliders will move to the left.

Just remove all unneeded controllers and try again.

Well that fixed the slider moving to the left. I do have a Saitek Cyborg Evo that was USB plugged in.

Yet with the slider now staying at the right most place I still have zero audio except for the splash screens for UBI soft and gearbox.

Any other help I'd really like to give this game a try.

Well it turns out that BIA HH did not support my sound card. I had a Turtle Beach Santa Cruz with the newest drivers that were stable.

Ended up buying a new Turtle Beach Montego 7.1 card. No problems with that one although I still think my old card sounded better. However the new card has better separation in the surround sound channels.

So yea, that fixed the audio and let me play the game to completion.