Audio in 1004
Alternate sound configurations can be set in /etc/pluto.conf. MOST sound cards should work out of the box, and do not require this parameter. This parameter may be written by /usr/pluto/bin/nvidia-install.sh for various GT chipsets. This can be done at avwizard on the Audio Selector step 5, or at any time by running /usr/pluto/bin/SetupAudioVideo.sh NOTE: Audio should NOT be actively playing when running SetupAudioVideo.sh.
Auto-detection is attempted when specific packages are installed, or if the pluto.conf "AlternateSC" setting is null or = 0. In most cases, this value will never exist.
Below are example /etc/asound.conf files generated by these configurations. /etc/pluto/xine.conf files borrow the card# and device# (if any) in the same way as the asound.conf
AlternateSC = null : Most cards function without this parameter, this is the default state.
- Analog, Optical, Coax and HDMI are treated the way they always have been, given only the card# to write to the confs.
- nVidia GT series HDMI is automatically detected, and given a special set of values, also using the card# and the device#.
AlternateSC = 1 : Should only be necessary for analog multi-channel.
- Analog Multi-channel are given the card# and the device# to write to the confs.
AlternateSC = 2 : Should only be necessary for oddballs that do not work under other two schemes, covers older equipment. This additionally changes the xine.conf scheme.
- Analog, Optical, Coax, HDMIare given an extended scheme, including both the card# and device#.
AlternateSC = 0 or null
Analog, Optical, Coax, HDMI
</etc/pluto/alsa/virtual_cards.conf> pcm_slave.analog_convert48k { pcm "analog_8:0,0" } pcm.analog_playback { type plug slave analog_convert48k } !default { type asym playback.pcm "analog_playback:0,0" capture.pcm "plughw:0,0" }
AlternateSC = 1
Analog Multi-channel, Optical, Coax, and HDMI
</etc/pluto/alsa/virtual_cards.conf> pcm.analog_6 { slave.pcm surround51 slave.rate 48000 slave.channels 6 type route ttable.0.0 1 ttable.1.1 1 ttable.0.2 1 ttable.1.3 1 ttable.0.4 0.5 ttable.1.4 0.5 ttable.0.5 0.5 ttable.1.5 0.5 } pcm.analog_8 { slave.pcm multi slave.rate 48000 slave.channels 8 type route ttable.0.0 1.0 ttable.1.1 1.0 ttable.2.2 1.0 ttable.3.3 1.0 ttable.4.4 1.0 ttable.5.5 1.0 ttable.0.6 1.0 ttable.1.7 1.0 ttable.2.6 0.7 ttable.3.7 0.7 ttable.4.6 0.7 ttable.4.7 0.7 ttable.5.6 0.5 ttable.5.7 0.5 } pcm_slave.analog_convert48k { pcm "analog_8:0,0" } pcm.analog_playback { type plug slave analog_convert48k } !default { type asym playback.pcm "analog_playback:0,0" capture.pcm "plughw:0,0" }
AlternateSC = 2
Analog, Optical, Coax, and HDMI
</etc/pluto/alsa/virtual_cards.conf> pcm_slave.hdmi_convert48k { pcm "hw:0" rate 48000 } pcm.hdmi_playback { type plug slave hdmi_convert48k } !default { type asym playback.pcm "hdmi_playback" capture.pcm "hw:0" }
xine.conf
In conditions of null, 0 values of AlternateSC for multi-channel audio, the last 4 lines of /etc/pluto/xine.conf looks like this
audio.device.alsa_front_device:plughw:0,3 audio.device.alsa_default_device:plughw:0,3 audio.output.speaker_arrangement:Pass Through audio.device.alsa_passthrough_device:plughw:0,3
In the case AlternateSC = 1, some sound cards cease functioning when the Pass Through arrangement is specified, instead of just the passthrough device.
audio.device.alsa_front_device:plughw:0,3 audio.device.alsa_default_device:plughw:0,3 audio.device.alsa_passthrough_device:plughw:0,3
All stereo analog appears like so:
audio.device.alsa_front_device:plughw:0,0 audio.device.alsa_default_device:plughw:0,0 audio.output.speaker_arrangement:Stereo 2.0
Except in the case of 2, when it appears like so:
audio.device.alsa_front_device:hw:0 audio.device.alsa_default_device:hw:0 audio.output.speaker_arrangement:Stereo 2.0