alsa-mixer: Enable volume control of SteelSeries Arctis stereo output

Since there is now support for specifying the index of an Element, add the
same config as is used for the output-mono variant, as they behave the same:
One volume control with no support for adjustments to the left and right
channels.

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/274>

diff --git a/src/modules/alsa/mixer/paths/usb-gaming-headset-output-stereo.conf b/src/modules/alsa/mixer/paths/usb-gaming-headset-output-stereo.conf
index e3f91cd..1a1e794 100644 (file)
--- a/src/modules/alsa/mixer/paths/usb-gaming-headset-output-stereo.conf
+++ b/src/modules/alsa/mixer/paths/usb-gaming-headset-output-stereo.conf
@@ -23,10 +23,12 @@
 ; Steelseries Arctis 7
 ; Steelseries Arctis Pro Wireless.
 ; Lucidsound LS31
-;
-; This path doesn't provide hardware volume control, because the stereo
-; output is controlled by the PCM element with index 1, and currently
-; PulseAudio only supports elements with index 0.
 
 [General]
 description-key = analog-output-headphones
+
+[Element PCM,1]
+volume = merge
+switch = mute
+override-map.1 = all
+override-map.2 = all-left,all-right