@HPO,
Since alsa-lib 1.0.28 is in utopic, you can just to modify /usr/share/pulseaudio/alsa-mixer/profile-sets/default.conf and add this section:
[Mapping analog-surround-21] device-strings = surround21:%f channel-map = front-left,front-right,lfe paths-output = analog-output analog-output-speaker analog-output-desktop-speaker priority = 8 direction = output
(Restart PulseAudio for changes to take effect.)
@HPO,
Since alsa-lib 1.0.28 is in utopic, you can just to modify /usr/share/ pulseaudio/ alsa-mixer/ profile- sets/default. conf and add this section:
[Mapping analog-surround-21] front-right, lfe output- speaker analog- output- desktop- speaker
device-strings = surround21:%f
channel-map = front-left,
paths-output = analog-output analog-
priority = 8
direction = output
(Restart PulseAudio for changes to take effect.)