[pulseaudio-discuss] PulseAudio Network Sink: Respect alternative sample rate and format

[Maximilian Böhm]

A bit unlucky but at least now I know that the tunnel sink doesn't switch the sample rate – after you initiate a server connection, right? So, to be sure, what happens when I start a 48 kHz stream on my client?
>  But I’m afraid my client could still be sending a resampled 41,1 kHz signal to the server.
> Also, no idea if the 24-bit format is preserved or cut to 16-bit (I play a lot video tracks in 24-bit).

Your other suggested method via hard coding the PA remote server doesn‘t work for my setup because I want to use a native sound card + usb sound card on the client too.

Thanks for your highly appreciated response and sorry for my late answer now!


24.07.2017 22:20 Tanu Kaskinen:
> On Sun, 2017-07-23 at 02:59 +0200, Maximilian Böhm wrote:
>> Hello, I’m very happy that I finally got PulseAudio’s awesome network
>> sink feature set up. Works so far, but the AV receiver on the other
>> computer tells me it gets 41,1 kHz whereas my input in the sink from
>> my client computer is 48 kHz (movies).
>> On both computers, the /etc/pulse/daemon.conf is configured like so:
>>
>> default-sample-format = s24le
>> default-sample-rate = 44100
>> alternate-sample-rate = 48000
>>
>> If I set the default sample rate to 48 kHz on the server, the AV
>> receiver gets 48 kHz as well. But I’m afraid my client could still be
>> sending a resampled 41,1 kHz signal to the server. Also, no idea if
>> the 24-bit format is preserved or cut to 16-bit (I play a lot video
>> tracks in 24-bit).
>> My preferred setup would be one in which the server switches from 48
>> kHz to 41,1 kHz dependent on how it gets input, like a desktop. BTW,
>> this works flawlessly over a direct S/PDIF connection from my
>> computers to the AV receiver.
>> I can’t find any documentation on this. Would appreciate your help.
> So you have loaded module-tunnel-sink on the client? The tunnel sink
> doesn't currently support switching the rate depending on what
> applications play to it.
>
> Do you use any local sound cards on the client? If not, then you could
> set "default-server = server_hostname_or_ip" in /etc/pulse/client.conf.
> Then all applications on the client machine will connect directly to
> the server machine. The sample rate that the server will then
> automatically change depending on the applications.
>