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Subject[65/90] ALSA: virtuoso: Xonar DS: fix polarity of front output
3.0-stable review patch.  If anyone has any objections, please let me know.


From: Clemens Ladisch <>

commit f0e48b6bd4e407459715240cd241ddb6b89bdf81 upstream.

The two DACs for the front output and the surround/center/LFE/back
outputs are wired up out of phase, so when channels are duplicated,
their sound can cancel out each other and result in a weaker bass
response. To fix this, reverse the polarity of the neutron flow to
the front output.

Reported-any-tested-by: Daniel Hill <>
Signed-off-by: Clemens Ladisch <>
Signed-off-by: Takashi Iwai <>
Signed-off-by: Greg Kroah-Hartman <>

sound/pci/oxygen/xonar_wm87x6.c | 1 +
1 file changed, 1 insertion(+)

--- a/sound/pci/oxygen/xonar_wm87x6.c
+++ b/sound/pci/oxygen/xonar_wm87x6.c
@@ -177,6 +177,7 @@ static void wm8776_registers_init(struct
struct xonar_wm87x6 *data = chip->model_data;

wm8776_write(chip, WM8776_RESET, 0);
+ wm8776_write(chip, WM8776_PHASESWAP, WM8776_PH_MASK);
wm8776_write(chip, WM8776_DACCTRL1, WM8776_DZCEN |
wm8776_write(chip, WM8776_DACMUTE, chip->dac_mute ? WM8776_DMUTE : 0);

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