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Operating Systems Linux Slackware Can't play sound files with aplay or cat to /dev/dsp Post 302478053 by slak0 on Tuesday 7th of December 2010 04:22:10 AM
Old 12-07-2010
Can't play sound files with aplay or cat to /dev/dsp

I am having problems using soundes. Until a few moments ago
the following commands produced errors and no sound:

cat /usr/share/apps/kolf/sounds/blackhole.wav/ > /dev/dsp yielded:
/dev/dsp: Invalid argument

cat /usr/share/apps/kolf/sounds/blackhole.wav > /dev/audio yelded:
/dev/audio: Invalid argument

aplay /usr/share/apps/kolf/sounds/blackhole.wav yielded:
main:590: audio open error: No such file or directory

and yet mplayer was happily playing audio with tv video. For that program the video is set up for drive 0 but for spurious reasons the program has to be fiddled to use drive 1. The camera, BT787, and VIA 8235 cards are 0, 1, 2 respectively. I don't know if this is related.

Now for no apparent reason it has started working. This is not a connection problem. It had been working until I installed Timidity++ which errors out also.
This is a 4 day headache so would make me happy if someone has a solution.
BTW I have seen suggestions to remove PCM add PCM, fiddle with XMMS and other supposed solutions. In scanning ALSAhowto I could find nothing that could link the responses I am getting. Thanks.

Last edited by slak0; 12-07-2010 at 05:29 AM..
 

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mpc123(1)						      General Commands Manual							 mpc123(1)

NAME
mpc123 - your handy Musepack audio player SYNOPSIS
mpc123 [options] file(s) DESCRIPTION
mpc123 is a command-line player for the Musepack audio compression format. mpc123 reads mpc audio files and decodes them to the devices specified on the command line. During playback, you can pass to the next playlist element (or a random one if one of the -z and -Z options were used, see below) by send- ing SIGINT to the process, thus usually pressing ^C will act as a "next-button" for the player. OPTIONS
--gain N, -g N Set gain (audio volume) to N (0-100 inclusive, default 100, 0 mutes sound) -o driver Set output devicetype to driver; possible drivers include: oss Linux Open Sound System alsa Advanced Linux Sound Architecture alsa09 ALSA version 0.9 and newer (you should really be using this) esd Enlightenment sound daemon arts Analog Real Time System (kde sound daemon) null Debugging output target --audiodevice dev, -a dev Use dev for audio-out; If not specified, the program tries to pick some sane defaults, based on the used audio output driver. Common devices include: /dev/dsp or /dev/dsp1 for oss output default or hw:0 for alsa09 output --au filename.au, -u filename.au Use au file filename.au for output --cdr filename.cdr, -c filename.cdr Use raw file filename.cdr for output (this can be used directly with cdrecord's -audio option) --wav filename.wav, -w filename.wav Use wave file filename.wav for output --list file, -@ file Use playlist file as list of Musepack files; The playlist format is simple: one file per line. You can easily generate a playlist for mpc123 with the find(1) command: find /path/to/musicroot -iname *.mpc -fprint file --random, -Z Play files randomly until interrupted --shuffle, -z Shuffle list of files before playing --verbose, -v Increase verbosity (default verbosity is 0), the more -v, the more verbose mpc123 becomes --quiet, -q Reset verbosity to 0 (no title or boilerplate); this is the default --help, -h Print the help screen, with some brief usage information AUTHOR
This manual page was written by Daniele Sempione <scrows at oziosi.org>; Fernando Vezzosi <fvezzosi at masobit.net> made some edits January 2006 mpc123(1)
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