[pulseaudio-discuss] Help in setting up PA

[Richard Geddes]

You are correct... latest release Ubuntu 7.10 comes with PA 0.9.6.  
I'll look into getting the latest version of PA.

My goal was to use PA as a replacement for esound server...  I'd like to
be able to record/mix different sound sources (midi, analog, sound from
files (mp3, wav, ogg, etc)) and be able to create different file
formats, including sound delivered in flash (I'm not a fan of flash as
it consumes alot of cpu time, but it is in demand).  I played with jackd
for a while and was impressed with it's technical capabilities, but
unfortunately, I haven't found a way to play flash sound through
jackd... that is, flash in firefox.  I found a how-to in the Ubuntu
forum that seemed to patch together a solution the involved PA:

http://ubuntu-utah.ubuntuforums.org/showthread.php?t=548178


and have run into configuration/version issues since.

Question:   PA, esound, jackd, etc.. are all called sound servers,
implying that you can replace one with another... like apache vs iis....
is the main difference that they use different client/server
communication protocols?  So, the competition among the sound servers is
really over the communication protocol... and it looks like sound
performance/features is affected by the communication protocol.



Tanu Kaskinen wrote:
> On Thu, Jan 31, 2008 at 08:52:32PM -0500, Richard Geddes wrote:
>   
>> The PA daemon is not starting and PA Manager is say "connection refused"
>> .  Not sure what to make of it, but your suggestions are welcome.
>>     
>
> "Connection refused" is the message you get when trying to
> use a pulse client program without having the daemon
> running.
>
>   
>> Here's some output from /var/log/messages:
>>
>>     
>>> pulseaudio[7278]: main.c: Module load failed.
>>> pulseaudio[7278]: main.c: failed to initialize daemon.
>>> pulseaudio[7288]: pid.c: daemon already running.
>>> pulseaudio[7288]: main.c: pa_pid_file_create() failed.
>>> pulseaudio[7291]: pid.c: daemon already running.
>>> pulseaudio[7291]: main.c: pa_pid_file_create() failed.
>>> pulseaudio[7285]: module-alsa-sink.c: Failed to set hardware
>>> parameters: Operation not permitted
>>> pulseaudio[7285]: module.c: Failed to load  module "module-alsa-sink"
>>> (argument: "sink_name=delta_out device=hw:0 channels=10
>>> channel_map=left,right,aux0,aux1,aux2,aux3,aux4,aux5,aux6,aux7"):
>>> initialization failed.
>>> pulseaudio[7285]: main.c: Module load failed.
>>> pulseaudio[7285]: main.c: failed to initialize daemon.
>>> pulseaudio[7294]: module-alsa-sink.c: Failed to set hardware
>>> parameters: Operation not permitted
>>> pulseaudio[7294]: module.c: Failed to load  module "module-alsa-sink"
>>> (argument: "sink_name=delta_out device=hw:0 channels=10
>>> channel_map=left,right,aux0,aux1,aux2,aux3,aux4,aux5,aux6,aux7"):
>>> initialization failed.
>>> pulseaudio[7294]: main.c: Module load failed.
>>> pulseaudio[7294]: main.c: failed to initialize daemon.
>>>       
>
> The "Failed to set hardware parameters: Operation not
> permitted" is an encrypted message, and means that
> pulseaudio couldn't open the device for 16-bit samples,
> because the device only supports 32-bit samples. You seem to
> have an older version of pulseaudio. Since 0.9.8 pulseaudio
> has supported 32-bit samples, so you'll have to upgrade to
> at least that version.
>
> An unrelated note: you seem to have made the decision to run
> pulseaudio as a system-wide daemon. That is not generally
> recommended way to run pulseaudio, it's only for the cases
> when the per-user way just doesn't cut it. This isn't a
> fatal mistake (if it's mistake at all, I don't know what
> kind of setup you actually have/need), and you don't
> necessarily need to fix it. Some information on this matter:
> http://www.pulseaudio.org/wiki/SystemWideInstance
>
>   
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