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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LEARN ABOUT DEBIAN
mixerctl
mixerctl(1) User Commands mixerctl(1)
NAME
mixerctl - audio mixer control command line application
SYNOPSIS
/usr/sbin/mixerctl [-a | -d dev] [-iv] [-e | -o]
DESCRIPTION
Some audio devices support the audio mixer functionality. See mixer(7I) for a complete description of the audio mixer. The mixerctl command
is used to control the mode of the audio mixer and to get information about the audio mixer and the audio device. See audio(7I) for
details.
OPTIONS
The following options are supported. If none are specified, option -i is assumed:
-a The command applies to all audio devices.
-d dev The dev argument specifies an alternate audio control device for the command to use.
-e Enables the audio mixer function if the audio device supports it. If supported, the audio mixer may be enabled at any time.
The command silently ignores the enable option if the audio mixer is already enabled.
-i Prints the audio device type information for the device and indicates whether the audio device uses the audio mixer. If the
device does use the audio mixer, this option displays the audio mixer's mode.
-o Turns off the audio mixer function if the audio device supports it. If supported, the audio mixer may be turned off if only
one process has the device opened with the O_RDWR flag, or, if two different processes have the device opened, one with the
O_RDONLY flag and the other with the O_WRONLY flag. (See open(2).) The command silently ignores the disable option if the
audio mixer function is already disabled.
-v Verbose mode. Prints the audio_info_t structure for the device, along with the device type information. This option implies
the -i option.
ENVIRONMENT VARIABLES
AUDIODEV If the -d and -a options are not specified, the AUDIODEV environment variable is consulted. If set, AUDIODEV will contain
the full path name of the user's default audio device. The default audio device will be converted into a control device,
and then used. If the AUDIODEV variable is not set, /dev/audioctl is used.
FILES
/dev/audioctl
/dev/sound/{0...n}ctl
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Architecture |SPARC, x86 |
+-----------------------------+-----------------------------+
|Availability |SUNWauda |
+-----------------------------+-----------------------------+
|Stability Level |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
audioconvert(1), audioplay(1), audiorecord(1), open(2), attributes(5), usb_ac(7D), audio(7I), audio_support(7I), mixer(7I)
SunOS 5.10 12 Mar 2001 mixerctl(1)