MPlayer not detecting pulse, alsa

[Caphi]

Trying to get off of OSS because it frequently doesn't work (see below), but the application doesn't notice pulse or alsa even though they're both installed and running. Video works just fine, it's just muted. MPlayer log output:

=======================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->192000)
ID_AUDIO_BITRATE=0
ID_AUDIO_RATE=48000
ID_AUDIO_NCH=2
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
==========================================================================
No such audio driver 'pulse'
No such audio driver 'alsa'
[AO OSS] audio_setup: Can't open audio device /dev/dsp: Device or resource busy
Failed to initialize audio driver 'oss'
[AO OSS] audio_setup: Can't open audio device /dev/dsp: Device or resource busy
DVB card number must be between 1 and 4
AO: [null] 48000Hz 2ch floatle (4 bytes per sample)
ID_AUDIO_CODEC=ffaac
[Mixer] No hardware mixing, inserting volume filter.
Starting playback...
Cache not responding!
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
ID_VIDEO_ASPECT=1.7778
[swscaler @ 0x8a9fcc0]using unscaled yuv420p -> rgb24 special converter
VO: [x11] 1280x720 => 1280x720 Planar YV12 [zoom]

[rvm]

Maybe your mplayer is compiled without support for pulse and alsa.