Comment 1 for bug 344588

Pretty sure Starcraft doesn't have support for actual multi-channel surround. If anything it may support "Dolby Pro Logic" or "Dolby Surround" neither of which are actual surround sound and don't require anything other than stereo from your soundcard (Pro Logic is decoded by a HiFi or amp that has that ability). Basically they are all "fake" surround.

Yeah, just checked, it's "Dolby Surround". There's nothing Wine needs to do to support this, it's already working, you just don't have the correct hardware connected to your PC.