[pulseaudio-discuss] Pulseaudio on the XO

Lennart Poettering lennart at poettering.net
Tue Jul 24 16:29:19 PDT 2007

On Mon, 23.07.07 15:07, Simon Schamijer (simon at schampijer.de) wrote:

> Hi,
> I have put up a site where I posted my tests on using pulseaudio within 
> the OLPC environment.
> http://wiki.laptop.org/go/Pulseaudio
> Please feel free to add and comment.

Just a quick comment on this:

As I told several people from OLPC already, I am not sure if PA is
ready for the XO yet. Because we don't close the audio device on idle
PA will shorten your battery time immensly. 

Also, we require FP for our calculations due to our reliance on
libsamplerate for resampling. Due to the slow FPU in the XO this might
be a problem as well.

Also, to be really useful PA should be able to change the fragsize
dynamically during playback, so that we can use large frags to save
power but use smaller frags when low-latency applications are
running. Unfortunately ALSA cannot do this as of now.

Next week I will visit Takashi Iwai from ALSA to discuss with him
which could be done to make PA more useful for embedded/slow/low-power

In short: right now I would not recommend running PA on the XO. We're
working on this, though.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net         ICQ# 11060553
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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