[pulseaudio-discuss] module-combine master parameter

Maarten Bosmans mkbosmans at gmail.com
Sat Mar 28 12:20:53 PDT 2009

On Fri, Mar 27, 2009 at 12:16 AM, Lennart Poettering
<lennart at poettering.net> wrote:
> On Thu, 26.03.09 20:43, Maarten Bosmans (mkbosmans at gmail.com) wrote:
>> It looks like the parameter master for module-combine doesn't work, it
>> gives an error upon loading the module. Only listing all the sinks
>> under slaves works though. I wanted to update the documentation on
>> http://pulseaudio.org/wiki/Modules#module-combine, but am not sure
>> about the details. Is it just that specifying the master isn't
>> necessary anymore?
> Yes, that is the case. All "sub"-sinks are now treated the same.
Thanks for the info, I updated the wiki to reflect this.

>> Without choosing a master sink the sample rate/type isn't correctly
>> chosen. I found this out when I combined three 48000 Hz sinks and saw
>> that the combined sink was somehow chosen to be the default 44100.
>> With only a listing of sinks under slaves it is not always obvious
>> which rate must be choosen, bute surely with three identical sinks the
>> sample rate/type of the combined sink should be the same.
> Currently the sampling rate of the combined sink is simply taken from
> the server's default sampling rate or from the settings passed as
> module arguments. But yes, for statically defined combined sinks
> (i.e. those with a fixed list of "sub"-sinks) it might make sense to
> deduce the sampling parameters from the "sub"-sinks at take the
> "highest" of the settings of them for the combined sink.
> Patches always welcome. Otherwise file a feature request bug and I
> will look into it eventually.
I did both: http://pulseaudio.org/ticket/521
Would you care to comment?

> Lennart
> --
> Lennart Poettering                        Red Hat, Inc.
> lennart [at] poettering [dot] net         ICQ# 11060553
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