NAS Audio spontaneously stopped working

[Peter S Galbraith <GalbraithP@dfo-mpo.gc.ca>]

I noticed that my audio wasn't working any more (on Debian 1.3 bo).
Any hints to how to get it working again are appreciated. (Did running
2.0.33 finally catch up to me?  I don't know.)

 # bplay bplay ~/debian-mail.au 
 bplay: /dev/dsp: No such device or address

 # cat ~/debian-mail.au > /dev/audio
 bash: /dev/audio: No such device or address

 # mtvp file.mpg
 Device busy or sampling rate not supported (muting): No such device or address

I get the same sort of error trying to start nas (which is what I usually use) 

 bash-2.01# /etc/init.d/nas start
 Starting the Network Audio System
 Fatal server error:
 could not create audio connection block info

When I call `au' explicitely:

 bash-2.01# strace /usr/X11R6/bin/au
 [deleted]
 open("/dev/dsp", O_RDWR)               = -1 ENXIO (No such device or address)
 open("/dev/pcaudio", O_RDWR)           = -1 ENOENT (No such file or directory)
 write(2, "\nFatal server error:\n", 21
 [deleted]

The dsp device is there:

 bash-2.01# ls -l /dev/dsp
 crw-rw----   1 root     audio     14,   3 Apr 14 08:50 /dev/dsp

The `pcaudio' wasn't (although I don't remember it ever being there)

 bash-2.01# ls -l /dev/pcaudio
 ls: /dev/pcaudio: No such file or directory

 bash-2.01# ./MAKEDEV pcaudio
 bash-2.01# ls -l /dev/pcaudio
 crw-rw----   1 root     audio     13,   4 Apr 15 11:43 /dev/pcaudio

 bash-2.01# rm /dev/dsp
 bash-2.01# cd /dev
 bash-2.01# ./MAKEDEV dsp
 bash-2.01# ls -l dsp
 crw-rw----   1 root     audio     14,   3 Apr 15 11:43 dsp

I still get an error after creating /dev/pcaudio or recreating /dev/dsp

 bash-2.01# strace /usr/X11R6/bin/au
 [deleted]
 open("/dev/dsp", O_RDWR)               = -1 ENXIO (No such device or address) 
 open("/dev/pcaudio", O_RDWR)           = -1 ENODEV (No such device)
 write(2, "\nFatal server error:\n", 21
 [deleted]

Here my sound stat file:

 bash-2.01# cat /dev/sndstat 
 Sound Driver:3.5.4-960630 (Thu Jan 22 11:44:21 EST 1998 root,
 Linux mixing 2.0.32 #2 Thu Nov 27 16:29:33 EST 1997 i686 unknown)
 Kernel: Linux mixing 2.0.33 #1 Thu Jan 22 11:46:21 EST 1998 i686
 Config options: 0
 
 Installed drivers: 
 Type 1: OPL-2/OPL-3 FM
 Type 2: Sound Blaster
 Type 7: SB MPU-401
 
 Card config: 
 (Sound Blaster at 0x220 irq 5 drq 1,5)
 (SB MPU-401 irq 1 drq 0)
 (OPL-2/OPL-3 FM at 0x388 drq 0)
 
 Audio devices:
 
 Synth devices:
 
 Midi devices:
 
 Timers:
 0: System clock
 
 Mixers:

-- 
Peter Galbraith, research scientist          <GalbraithP@dfo-mpo.gc.ca>
Maurice Lamontagne Institute, Department of Fisheries and Oceans Canada
P.O. Box 1000, Mont-Joli Qc, G5H 3Z4 Canada. 418-775-0852 FAX: 775-0546
         ** New E-Mail. galbraith@mixing.qc.dfo.ca is cut off **


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