[MPlayer-users] 100% cpu usage when playing a mp3 file with alsa9:surround40 -channels 4

[Thomas Zangl - Mobil]

Hi,

Since I use mplayer (8 months) I experienced a 100% cpu usage when I play
a mp3 file with the following command line:

mplayer -ao alsa9:surround40 -channels 4 "mymp3file"

if I just use mplayer -ao alsa9 it uses less than 1% cpu time.

Why? Whats the big diffrence between those 2 commandlines, except the first
one (maybe) uses all 4 channels my soundcard provides.

Alsa Version is: ALSA-0.9.7
I´ve got a SB Live! Value soundcard, using those modules:
snd-emu10k1            74740   1
snd-pcm                64928   0  [snd-emu10k1]
snd-timer              15780   0  [snd-pcm]
snd-rawmidi            15072   0  [snd-emu10k1]
snd-util-mem            1376   0  [snd-emu10k1]
snd-page-alloc          6740   0  [snd-emu10k1 snd-pcm]
snd-ac97-codec         41880   0  [snd-emu10k1]
snd-hwdep               5216   0  [snd-emu10k1]
snd-seq-device          4320   0  [snd-emu10k1 snd-rawmidi]
snd                    32804   0  [snd-mixer-oss snd-emu10k1 snd-pcm snd-timer snd-rawmidi snd-util-mem snd-ac97-codec snd-hwdep snd-seq-device]

Any ideas? TIA,
-- 
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