Download location (HTTP): http://www.alsa-project.org/alsa/ftp/utils/alsa-utils-0.9.2.tar.bz2 Download location (FTP): ftp://ftp.alsa-project.org/pub/utils/alsa-utils-0.9.2.tar.bz2 Version used: 0.9.2 Package size: 106 KB Estimated Disk space required: 1.8 MB |
The alsa-utils package contains various utilities which are useful for controlling your sound card.
alsa-utils depends on: alsa-lib-0.9.2 |
Install alsa-utils by running the following commands:
./configure && make && make install |
/etc/asound.state
Probably the easiest way to store mixer levels is to set and retrieve them using a bootscript. It is possible to do this with a post-install line in /etc/modules.conf but this is left as an exercise for those readers who wish to do this.
The alsa-drivers package installs a script as /etc/rc.d/init.d/alsasound. While it is possible to use this script, it contains a lot of extraneous detail which isn't needed on an LFS system and so we create our own script /etc/rc.d/init.d/alsa.
To create the alsa script, do the following:
cat > /etc/rc.d/init.d/alsa << "EOF"
#!/bin/sh
# Begin $rc_base/init.d/alsa
# Based on sysklogd script from LFS-3.1 and earlier.
# Rewritten by Gerard Beekmans - gerard@linuxfromscratch.org
# ALSA specific parts by Mark Hymers - markh@linuxfromscratch.org
# Stores mixer settings in the default location: /etc/asound.state
source /etc/sysconfig/rc
source $rc_functions
case "$1" in
start)
echo "Starting alsa... Restoring volumes..."
loadproc /usr/sbin/alsactl restore
#echo " Loading MIDI font..."
#loadproc sfxload /path/to/soundfont
;;
stop)
echo "Stopping alsa... Saving volumes......"
loadproc /usr/sbin/alsactl store
#echo " Removing MIDI font.........."
#loadproc sfxload -i
;;
restart)
$0 stop
/usr/bin/sleep 1
$0 start
;;
*)
echo "Usage: $0 {start|stop|restart}"
exit 1
;;
esac
# End $rc_base/init.d/alsa
EOF
chmod 755 /etc/rc.d/init.d/alsa |
You can then create the appropriate symlinks:
cd /etc/rc.d/init.d && ln -sf ../init.d/alsa ../rc0.d/K35alsa && ln -sf ../init.d/alsa ../rc1.d/K35alsa && ln -sf ../init.d/alsa ../rc2.d/S40alsa && ln -sf ../init.d/alsa ../rc3.d/S40alsa && ln -sf ../init.d/alsa ../rc4.d/S40alsa && ln -sf ../init.d/alsa ../rc5.d/S40alsa && ln -sf ../init.d/alsa ../rc6.d/K35alsa |
Note that all channels of your soundcard are muted by default. You can use the alsamixer program from alsa-utils (or any other OSS mixer) to change this.
Also, the first time the above script is run, it will complain that there is no state in /etc/asound.state. You can prevent this by running the following commands after installing alsa-utils:
touch /etc/asound.state && alsactl store |
A final note is that the lines loading sfxload are commented out. They are there as an example of other things you may wish to do in the startup script. sfxload is a separate package of interest to SoundBlaster AWE and Live! users. It is designed for loading "sound-fonts" (which are used for MIDI output). You may wish to delete these lines and add your own or, if you have the relevant soundcard, install sfxload and uncomment them.
The alsa-utils package contains aconnect, alsactl, alsamixer, amixer, aplay, arecord and aseqnet.
aconnect is a utility for connecting and disconnecting two existing ports in the ALSA sequencer system.
alsactl is used to control advanced settings for the ALSA soundcard drivers.
alsamixer is an ncurses-based mixer program for use with the ALSA soundcard drivers.
amixer allows command-line control of the mixers for the ALSA soundcard drivers.
aplay is a command-line soundfile player for the ALSA soundcard drivers.
arecord is a command-line soundfile recorder for the ALSA soundcard drivers.
aseqnet is an ALSA sequencer client which sends and receives event packets over a network.