here is the trace Mplayer gives me

Opening audio decoder: [mp3lib] MPEG layer-2, layer-3

AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)

Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)

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[AO OSS] audio_setup: Can't open audio device /dev/dsp: Permission denied [AO_ALSA] alsa-lib: confmisc.c:768:(parse_card) cannot find card '0'

[AO_ALSA] alsa-lib: conf.c:4154:(_snd_config_evaluate) function snd_func_card_driver returned error: Permission denied [AO_ALSA] alsa-lib: confmisc.c:392:(snd_func_concat) error evaluating strings [AO_ALSA] alsa-lib: conf.c:4154:(_snd_config_evaluate) function snd_func_concat returned error: Permission denied [AO_ALSA] alsa-lib: confmisc.c:1251:(snd_func_refer) error evaluating name [AO_ALSA] alsa-lib: conf.c:4154:(_snd_config_evaluate) function snd_func_refer returned error: Permission denied [AO_ALSA] alsa-lib: conf.c:4633:(snd_config_expand) Evaluate error: Permission denied [AO_ALSA] alsa-lib: pcm.c:2211:(snd_pcm_open_noupdate) Unknown PCM default [AO_ALSA] Playback open error: Permission denied [AO ESD] esd_open_sound failed: Connection timed out

waitpid(): No child processes AO: [pulse] Init failed: Internal error [JACK] cannot open server [AO SDL] Samplerate: 48000Hz Channels: Stereo Format s16le [AO_ALSA] alsa-lib: confmisc.c:768:(parse_card) cannot find card '0' [AO_ALSA] alsa-lib: conf.c:4154:(_snd_config_evaluate) function snd_func_card_driver returned error: Permission denied [AO_ALSA] alsa-lib: confmisc.c:392:(snd_func_concat) error evaluating strings [AO_ALSA] alsa-lib: conf.c:4154:(_snd_config_evaluate) function snd_func_concat returned error: Permission denied [AO_ALSA] alsa-lib: confmisc.c:1251:(snd_func_refer) error evaluating name [AO_ALSA] alsa-lib: conf.c:4154:(_snd_config_evaluate) function snd_func_refer returned error: Permission denied [AO_ALSA] alsa-lib: conf.c:4633:(snd_config_expand) Evaluate error: Permission denied [AO_ALSA] alsa-lib: pcm.c:2211:(snd_pcm_open_noupdate) Unknown PCM default waitpid(): No child processes [AO SDL] Unable to open audio: No available audio device DVB card number must be between 1 and 4 AO: [null] 48000Hz 2ch s16le (2 bytes per sample) Starting playback...