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PulseAudio default Sink (output)

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MythTV suddenly stopped audio (yet again : Every upgrade the reason is different). This time, it appears that the order the audio cards are detected has changed, so the default output has changed...

The following is relevant to the process (haven't tested this through a reboot, yet) :

bash
$ pacmd help
$ pacmd info  | grep -i default
$ pacmd list-sinks
$ pacmd info  | grep -i alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo
$ pacmd set-default-sink alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo
$ pacmd info  | grep -i alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo
$ speaker-test
$ aplay /usr/share/sounds/ekiga/ring.wav
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