[pulseaudio-discuss] using pulseaudio to listen to remote computers

[Simon Eigeldinger]

Hi Col,

thanks for the info.

might check that out.

greetings,
simon



Am 03.11.2012 21:17, schrieb Colin Guthrie:
> Hello Simon,
>
> Firstly apologies for the very late reply to your email.
>
> I will break with tradition and reply with a top post as I assume that
> will be more convenient for you (forgive my ignorance if this is not the
> case!)
>
> PulseAudio does have some degree of automatic network transparency. If
> you enable network access (currently done via the paprefs program) and
> assuming there are no firewalling issues, running applications remotely
> via SSH and X11 forwarding will also forward the sound.
>
> This works because we inject configuration variables into the X11 root
> window via properties (which can be examined via a "xprop -root | grep
> PULSE" command). These are then forwarded by SSH with it's X11
> forwarding capabilities. When the remote application is run, it is
> visually presented locally via this X11 forwarding but in addition, any
> audio applications using libpulse (which includes ALSA applications on a
> typical setup) will read the connection string from the X11 window
> properties and then establish a direct connection (which is separate to
> the SSH tunnels) back to your local system. Thus sounds "just work". The
> fact that PA is not tunnelled through SSH directly like X11 is a problem
> that would be very nice to solve. Maybe with Wayland coming along,
> someone will find a more generic way to teach SSH forwarding
> capabilities and we can utilise that for PulseAudio more robustly.
>
> I've more information on this configuration on an article I wrote a long
> time back under the heading "Remote X11 Application":
> http://colin.guthr.ie/2009/08/sound-on-linux-is-confusing-defuzzing-part-2-pulseaudio/
>
>
>
> Regarding VNC clients or similar, I'm not too sure what the current
> state there is regarding audio support, so I cannot really offer any
> real comments there.
>
> I hope this information helps.
>
> All the best
>
> Col
>
> 'Twas brillig, and Simon Eigeldinger at 22/07/12 23:15 did gyre and gimble:
>> I am simon and i am blind. i have a linux and a windows machine over
>> here. unfortunately the remote control clients just allow to be graphics
>> to be transfered so the user can see whats happening on the computer.
>> as a blind person i often experience the problem of being not able to
>> use remote control software cause they are not able to transfer the
>> sound with the vnc or other remote control software.
>> So i currently wonder if PulseAudio could help there. I know that ubuntu
>> 12.04 uses pulseaudio as its default sound server and now i wonder if i
>> just ccould listen at this server and play the sounds back which my
>> software speech plays there.
>>
>> or does someone have a better solution.
>>
>> i saw there is a test build of pulseaudio for windows so i wonder if it
>> would work enough to listen at the linux machine but also listen at the
>> windows machine too.
>>
>>
>>
>>
>> Sorry for that thorn appart e-mail. its quite late *smile*.
>>
>>
>> greetings,
>> simon
>>
>
>

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