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| author | Eric Wong <normalperson@yhbt.net> | 2006-07-16 16:52:19 +0000 |
|---|---|---|
| committer | Eric Wong <normalperson@yhbt.net> | 2006-07-16 16:52:19 +0000 |
| commit | 8224e837ef60278a9a1140515d79650d9024757e (patch) | |
| tree | 7563078b9f4a129c9fb9a09cbf7c37dd5da1cf3b /doc | |
| parent | 3c8e88b053e901de804a7d38f709056444155161 (diff) | |
| download | mpd-8224e837ef60278a9a1140515d79650d9024757e.tar.gz mpd-8224e837ef60278a9a1140515d79650d9024757e.tar.xz mpd-8224e837ef60278a9a1140515d79650d9024757e.zip | |
audioOutput_alsa: add use_mmap, period_time, buffer_time options
ALSA support in libao supports configuring of these variables,
and some hardware setups may benefit from having these things
as tweakable.
git-svn-id: https://svn.musicpd.org/mpd/trunk@4363 09075e82-0dd4-0310-85a5-a0d7c8717e4f
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/mpd.conf.5 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/mpd.conf.5 b/doc/mpd.conf.5 index 7ff364b8b..88c9a6d85 100644 --- a/doc/mpd.conf.5 +++ b/doc/mpd.conf.5 @@ -236,6 +236,26 @@ separate options. An example for oss: "dsp=/dev/dsp". An example for alsa09: This specifies how many bytes to write to the audio device at once. Used only by the ao output type. This parameter is to work around a bug in older versions of libao on sound cards with very small buffers. The default is 1024. +.SH OPTIONAL ALSA OUTPUT PARAMETERS +.TP +.B use_mmap <yes or no> +Setting this allows you to use memory-mapped I/O. Certain hardware setups +may benefit from this, but most do not. +Most users do not need to set this. +.TP +.B buffer_time <time in microseconds> +This sets the length of the hardware sample buffer in microseconds. +Increasing it may help to reduce or eliminate skipping on certain setups. +Most users do not need to change this. +The default is 500000 microseconds (0.5 seconds). +.TP +.B period_time <time in microseconds> +This sets the time between hardware sample transfers in microseconds. +Increasing this can reduce CPU usage while lowering it can reduce underrun +errors on bandwidth-limited devices. Some users have reported good results +with this set to 50000, but not all devices support values this high. +Most users do not need to change this. +The default is 256000000 / sample_rate(kHz), or 5804us for CD-quality audio. .SH REQUIRED SHOUT OUTPUT PARAMETERS .TP .B name <name> |