FAudio MinGW (dlls) builds for Wine. Compiled with FFmpeg (and therefore WMA) support.
Use wine_setup_faudio.sh script to install FAudio. And don't forget to specify path to your Wine prefix. For example:
WINEPREFIX="$HOME/some_prefix" ./wine_setup_faudio.sh
Script creates symlinks to FAudio dlls, so don't remove FAudio directory after installation.
FAudio is an XAudio reimplementation, it fixes sound issues in many games.