~$ sudo fuser /dev/mixer ~$ sudo fuser /dev/audio ~$ sudo fuser /dev/snd ~$ sudo fuser /dev/dsp ~$ sudo fuser /dev/adsp ~$ lshal | grep device_file alsa.device_file = '/dev/snd/timer' (string) linux.device_file = '/dev/snd/timer' (string) linux.device_file = '/dev/sequencer2' (string) oss.device_file = '/dev/sequencer2' (string) linux.device_file = '/dev/sequencer' (string) oss.device_file = '/dev/sequencer' (string) alsa.device_file = '/dev/snd/seq' (string) linux.device_file = '/dev/snd/seq' (string) linux.device_file = '/dev/ttyS1' (string) linux.device_file = '/dev/ttyS0' (string) linux.device_file = '/dev/input/event0' (string) linux.device_file = '/dev/input/event1' (string) alsa.device_file = '/dev/snd/pcmC0D1p' (string) linux.device_file = '/dev/snd/pcmC0D1p' (string) alsa.device_file = '/dev/snd/pcmC0D0p' (string) linux.device_file = '/dev/snd/pcmC0D0p' (string) alsa.device_file = '/dev/snd/pcmC0D0c' (string) linux.device_file = '/dev/snd/pcmC0D0c' (string) linux.device_file = '/dev/mixer' (string) oss.device_file = '/dev/mixer' (string) alsa.device_file = '/dev/snd/midiC0D0' (string) linux.device_file = '/dev/snd/midiC0D0' (string) linux.device_file = '/dev/midi' (string) oss.device_file = '/dev/midi' (string) linux.device_file = '/dev/dsp' (string) oss.device_file = '/dev/dsp' (string) alsa.device_file = '/dev/snd/controlC0' (string) linux.device_file = '/dev/snd/controlC0' (string) linux.device_file = '/dev/audio' (string) oss.device_file = '/dev/audio' (string) linux.device_file = '/dev/adsp' (string) oss.device_file = '/dev/adsp' (string) linux.device_file = '/dev/bus/usb/001/001' (string) ~$ dpkg -l alsa*| grep ^.i ii alsa-base 1.0.13-5 ALSA driver configuration files ii alsa-oss 1.0.12-1 ALSA wrapper for OSS applications ii alsa-source 1.0.13-5 ALSA driver sources ii alsa-tools 1.0.13-1 Console based ALSA utilities for specific ha ii alsa-tools-gui 1.0.13-1 GUI based ALSA utilities for specific hardwa ii alsa-utils 1.0.13-2 ALSA utilities ii alsamixergui 0.9.0rc2-1-9 graphical soundcard mixer for ALSA soundcard ii alsaplayer-alsa 0.99.77-1 PCM player designed for ALSA (ALSA output mo ii alsaplayer-common 0.99.77-1 PCM player designed for ALSA (common files) ii alsaplayer-daemon 0.99.77-1 PCM player designed for ALSA (non-interactiv ii alsaplayer-gtk 0.99.77-1 PCM player designed for ALSA (GTK version) ii alsaplayer-text 0.99.77-1 PCM player designed for ALSA (text version) ~$ dlocate fuser psmisc: /bin/fuser ~$ dpkg -l psmisc | grep ^.i ii psmisc 22.5-1 Utilities that use the proc filesystem ~$ cat /proc/asound/cards 0 [AudioPCI ]: ENS1371 - Ensoniq AudioPCI Ensoniq AudioPCI ENS1371 at 0x1040, irq 11 ~$ lspci | grep -i audio 00:0c.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 06) ~$ lsmod | grep snd snd_ens1371 22400 0 gameport 13480 1 snd_ens1371 snd_seq_dummy 3492 0 snd_seq_oss 27716 0 snd_seq_midi 8000 0 snd_seq_midi_event 6400 2 snd_seq_oss,snd_seq_midi snd_seq 43532 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event snd_rawmidi 22048 2 snd_ens1371,snd_seq_midi snd_seq_device 8236 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq,snd_rawmidi snd_ac97_codec 82784 1 snd_ens1371 snd_ac97_bus 2048 1 snd_ac97_codec snd_pcm_oss 43520 0 snd_mixer_oss 15584 1 snd_pcm_oss snd_pcm 74408 3 snd_ens1371,snd_ac97_codec,snd_pcm_oss snd_timer 20292 2 snd_seq,snd_pcm snd 46080 10 snd_ens1371,snd_seq_oss,snd_seq,snd_rawmidi,snd_seq_device,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer soundcore 8672 1 snd snd_page_alloc 9800 1 snd_pcm ############################################ Mplayer is playing an AudioCD in /dev/hdd and I have Line In from my CableTV box and can hear both with no issue. Previously i had "artsd" running - but i killed it for unrelated reasons , and besides nothing has changed, though i haven't run these above commands and outputs with artsd running, but i can verify most are the same Here *was* what ps aux reported about artsd prior to it being killed; /usr/bin/artsd -F 11 -S 4096 -a alsa -d -r 44100 -b 16 -s 60 -m artsmessage -c drkonqi -l 3 -f ##############################################