Emulator

Game Name?
Mario Kart Wii

Game ID?
RMCP01

What's the problem? Describe what went wrong in few words.
Using OpenAL sound back-end, no sound is played in main menu, and sound is completely out of sync while in game (starting with fast-forward playback of what did not play in the main menu)

What did you expect to happen instead?
The sound to be in sync with the game.

What steps will reproduce the problem?
[Don't assume we have ever played the game and know any level names. Be as
specific as possible.]

1. Select the OpenAL backend
2. Start the game
3. Listen to the silence
4. Start a new game
5. Listen to the garbage

Dolphin 3.5 and 3.5-367 are old versions of Dolphin that have
known issues and bugs, so don't report issues about them and test the
latest Dolphin version first.
Which versions of Dolphin did you test on?
4.0-4701
Tried down to official 4.0. Sound play seems to start earlier, but still not as expected.

Does using an older version of Dolphin solve your issue? If yes, which
versions of Dolphin used to work?
Dolphin 3.5 works :) !

What are your PC specifications? (including, but not limited to: Operating
System, CPU and GPU)
21" iMac from 2011 :
. 3,06 GHz Intel Core i3
. 8 Go 1333 MHz DDR3
. ATI Radeon HD 4670 256 Mo
. OS X 10.10.1

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)
Nop