USB Mixer: usb_id=0x1043857c, ctrlif=0, ctlerr=0
Card: ASUS Xonar U7 at usb-0000:00:13.2-5, high speed
  Unit: 13
    Control: name="Speaker Playback", index=0
    Info: id=13, control=12, cmask=0x3, channels=2, type="S16"
    Volume: min=-3072, max=0, dBmin=-1200, dBmax=0
  Unit: 13
    Control: name="Speaker Playback Volume", index=0
    Info: id=13, control=2, cmask=0xff, channels=8, type="S16"
    Volume: min=-32512, max=0, dBmin=-12700, dBmax=0
  Unit: 13
    Control: name="Speaker Playback Switch", index=0
    Info: id=13, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 14
    Control: name="IEC958 Playback Switch", index=0
    Info: id=14, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 16
    Control: name="Mic Capture Switch", index=0
    Info: id=16, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 17
    Control: name="Line Capture Switch", index=0
    Info: id=17, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 20
    Control: name="Capture Source", index=0
    Info: id=20, control=1, cmask=0x0, channels=1, type="U8"
    Volume: min=1, max=2, dBmin=0, dBmax=0