Emulator

Game Name?
Pokémon XD: Gale of Darkness

Game ID?
GXXE01

What's the problem? Describe what went wrong in few words.
When using the High Level DSP, the High Hat Cymbals appear to "strobe" in volume levels.

What did you expect to happen instead?
The high hats to come out cleanly.

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. From the Main Menu, go to VS Mode
2. Quick Battle
3. Battle VS CPU
4. In the example I posted below, RSE Champion is playing. If it doesn't play, just exit and enter the battle till it does.

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?
4.0-6957

Does using an older version of Dolphin solve your issue? If yes, which
versions of Dolphin used to work?
I've tested on 6904 thinking that 6906 may have been the cause of this issue. I was surprised to find that using the previous version didn't help.

What are your PC specifications? (including, but not limited to: Operating
System, CPU and GPU)
Windows 7 x64 (SP1)
nVidia GeForce GTX 760 (Gigabyte GV-N760OC-2GD REV2.0)
Intel Core i7-4770
8GB G.Skill Sniper Low Voltage edition

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)
[Upload big files to a hosting service and post links here!]

Audio file demonstrating this inaccuracy, complete with helpful Speakonia guide!

http://www.mediafire.com/listen/4rscmaaiyk9fv2m/High_hat_DSP.wav