The solution to this problem:
> 2015/01/08 18:39:55 [threads:1] Thread "alsa_out(default)" aborts with
> exception Alsa error: No such device or address!
> 2015/01/08 18:39:56 [threads:3] Raised by primitive operation at file "",
> line 0, characters 0-0
> Thread 4 killed on uncaught exception Alsa.Unknown_error(6)
> 2015/01/08 18:39:56 [main:3] Shutdown started!
When running something very basic like:
liquidsoap 'output.alsa(sine())'
Is to create a file /etc/asound.conf and to put this in it:
> pcm.!default {
> type hw
> card 0
> }
> ctl.!default {
> type hw
> card 0
> }
Why?
Because liquidsoap by default (and Airtime without any choice, you have to use
it), uses the audio device "default". And on some distributions (Ubuntu 12.04
server in this case, but also Raspbian and others), there is no default device.
You have to specify hw:0,0 or some similar thing.
Programs like ogg123 intelligently do this automatically if there's no default.
Liquidsoap does not, so you MUST create the default device.
So, the above minimal /etc/asound.conf file adds a very minimal default device.
Then, liquidsoap can access the device without having to provide a device
argument to output.alsa (which would be an alternative solution as well).
-ken
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