[pulseaudio-discuss] pax11publish -e -S

Matt Zagrabelny mzagrabe at d.umn.edu
Thu Nov 4 17:57:09 PDT 2010

On Sun, Oct 24, 2010 at 11:48 AM, Colin Guthrie <gmane at colin.guthr.ie> wrote:
> 'Twas brillig, and Matt Zagrabelny at 24/10/10 11:58 did gyre and gimble:
>> On Sun, Oct 24, 2010 at 2:01 AM, Colin Guthrie <gmane at colin.guthr.ie> wrote:
>>> For what it's worth, when you first log into X11, PA loads the modules
>>> module-x11-publish (via start-pulseaudio-x11), which should export the
>>> properties you need and not require pax11publish to be run manually.
>> I didn't mention that 'zombie' is a headless system and PA is running
>> in system mode.
> Oh right. I didn't fully read the previous email... turns out you're
> kinda approaching the problem in the wrong way... I'll explain below.
>>> Make sure you are not using padevchooser as it's messes about with the
>>> x11 properties and the default setup should be sufficient for your needs.
>> Sure. I've stayed away from padevchooser after seeing recommendations
>> to not use it on the list. Its interface is still pretty nice, though.
>> Just out of curiosity, is it possible to send one application to
>> another SINK/SERVER or do you need to send all of your local audio
>> traffic to it?
> Yes. You can do this one of two ways. The first way is a bit brutal: do
> something like:
>  export PULSE_SERVER=zombie; my-sound-producing-application
> this will tell your app to talk _directly_ to the zombie's PA server.
> And here is where things get interesting. You probably don't _want_ to
> get your localhost to talk directly to zombie, but rather go through a
> "tunnel" sink. Tunnels appear in your local PA and are the same as any
> other real output device except, as the name suggests, they are just
> tunnels over the network to the h/w on a remote machine.
> You can load a tunnel sink via:
> pacmd load-module module-tunnel-sink sever=zombie sink_name="tunnel"
> That way you don't mess around with pax11publish, or padevchooser or
> client.conf at all, you just play to your local PA and when you want an
> application to output to zombie, just fire up pavucontrol and find the
> application in question under the "Playback" tab and move it to the
> remove device.
> You don't even really need to load the module-tunnel-sink manually as
> you can let avahi do this for you automatically. Just ensure you have
> module-zeroconf-publish running in your system-wide PA on zombie and
> then load up paprefs on your localhost and tick the box that says "Make
> discovered devices on the network available locally" or something
> similar. This setting in paprefs will load module-zeroconf-discover in
> your localhost PA and thus load module-tunnel-sink for you automatically
> when it finds one. This needs a working avahi setup obviously, but you
> can debug that with avahi-browse -ta on your local machine.

Suppose I wanted to do this without avahi?

I've done the following:

pacmd load-module module-tunnel-sink sever=zombie sink_name="tunnel"
Welcome to PulseAudio! Use "help" for usage information.
>>> Module load failed.
>>> %

So I tweaked the command a little:

pacmd load-module module-tunnel-sink server=zombie:4713
sink=alsa_output.hw_0 format=s16le channels=2 rate=44100
sink_name=tunnel.zombie channel_map=front-left,front-right
Welcome to PulseAudio! Use "help" for usage information.
>>> >>> %

It looks a little better.

pactl list | grep tunnel || echo not found
not found

But I still don't see the tunnel device. Any ideas?


-matt zagrabelny

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