[pulseaudio-discuss] HOWTO: A52 Encoded 5.1 Surround SoundAwesomeness with PulseAudio and ALSA

Jim Duda jim at duda.tzo.com
Tue Apr 15 05:24:29 PDT 2008

I can confirm that this work fine with my dolby decoder receiver.  I needed to add
the mmap=0 and fragments=6 switches to avoid any audio stutter.  When using this
method, pulseaudio consumes 20% of my 2.4G P4 processor while idle and 40% while
playing a stream via rtp_recv.  I assume this extra processor requirement is actually being
consumed by the a52 encoder in the alsa plugin?


"Jim Duda" <jim at duda.tzo.com> wrote in message news:fu0g44$8sr$1 at ger.gmane.org...
> Here is a very useful cross-post for a52 encoding with pulseaudio.
> http://ubuntuforums.org/showthread.php?t=714712
> I've been trying to accomplish the exact same solution and encountered the stuttering sound issue this weekend.
> I hope the use of fragments will resolve the stuttering sound I am having too.
> Jim 

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