http://bugs.winehq.org/show_bug.cgi?id=14559
--- Comment #71 from Raymond superquad.vortex2@gmail.com 2011-12-02 01:25:37 CST --- It look like wine create two mixer devices for each duplex device and one mixer device for usb mic (half-duplex) instead of a single mixer device for a full duplex card which has playback controls and capture controls
this is why there are two master volume controls in playback mixer device and capture mixer device