Problem with Pikmin

[Shonumi]

Yeah, this game has quite a few audio bugs with HLE. The best solution is to use LLE audio, but to do that you need to dump your DSP files from your console. If you haven't done so yet, there's a guide here describing how to extract the files. Once you've done that, you should be able to use LLE audio in your DSP settings. While LLE audio solves most of the audio issues for this game, it is more demanding than HLE. If you're not getting 100% emulation speed already with HLE, LLE will sound pretty bad itself.