Georgina Joyce write:
Surely if I installed aumix and set the volumes via aumix, it would affect all
sound cards?
No. This would also fail on my "Intel HD Audio" onboard sound chip.
There is no "Master", "PCM" is a software-olny volume control that
doesn't even exist until at least one application attempts to play
sound, and the thing you really need to unmute ("Front") is not
accessible via aumix.
Attached is a volume restoration script from Debian. It does the right
thing for most cards, not including, however, my old FM801-based card
("wave" sould never be set to more than 74%, because otherwise clipping
appears).
Unfortunately, I have caught a cold again, so there will be no changes
in the LiveCD repository for a week or so.
--
Alexander E. Patrakov
#!/bin/sh
#
# alsa-utils initscript
#
### BEGIN INIT INFO
# Provides: alsa-utils
# Required-Start: $local_fs
# Required-Stop: $local_fs
# Should-Start:
# Should-Stop:
# Default-Start: S
# Default-Stop: 0 6
# Short-Description: Restore and store ALSA driver settings
# Description: This script stores and restores mixer levels on
# shutdown and bootup.On sysv-rc systems: to
# disable storing of mixer levels on shutdown,
# remove /etc/rc[06].d/K50alsa-utils. To disable
# restoring of mixer levels on bootup, rename the
# "S50alsa-utils" symbolic link in /etc/rcS.d/ to
# "K50alsa-utils".
### END INIT INFO
# Don't use set -e; check exit status instead
# Exit silently if package is no longer installed
[ -x /usr/sbin/alsactl ] || exit 0
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
MYNAME=/etc/init.d/alsa-utils
. /lib/lsb/init-functions
# $1 EXITSTATUS
# [$2 MESSAGE]
log_action_end_msg_and_exit()
{
log_action_end_msg "$1" ${2:+"$2"}
exit $1
}
# $1 PROGRAM
executable()
{
# If which is not available then we must be running before
# /usr is mounted on a system that has which in /usr/bin/.
# Conclude that $1 is not executable.
[ -x /bin/which ] || [ -x /usr/bin/which ] || return 1
which "$1" >/dev/null 2>&1
}
executable amixer || { echo "${MYNAME}: Error: No amixer program available."
>&2 ; exit 1 ; }
bugout() { echo "${MYNAME}: Programming error" >&2 ; exit 123 ; }
# $1 <card ID> | "all"
restore_levels()
{
[ -f /var/lib/alsa/asound.state ] || return 1
CARD="$1"
[ "$1" = all ] && CARD=""
# Assume that if alsactl prints a message on stderr
# then it failed somehow. This works around the fact
# that alsactl doesn't return nonzero status when it
# can't restore settings for the card
if MSG="$(alsactl restore $CARD 2>&1 >/dev/null)" && [ ! "$MSG" ] ; then
return 0
else
# Retry with the "force" option. This restores more levels
# but it results in much longer error messages.
alsactl -F restore $CARD >/dev/null 2>&1
log_action_cont_msg "warning: 'alsactl restore${CARD:+ $CARD}'
failed with error message '$MSG'"
return 1
fi
}
# $1 <card ID> | "all"
store_levels()
{
CARD="$1"
[ "$1" = all ] && CARD=""
if MSG="$(alsactl store $CARD 2>&1)" ; then
sleep 1
return 0
else
log_action_cont_msg "warning: 'alsactl store${CARD:+ $CARD}'
failed with error message '$MSG'"
return 1
fi
}
echo_card_indices()
{
if [ -f /proc/asound/cards ] ; then
sed -n -e's/^[[:space:]]*\([0-7]\)[[:space:]].*/\1/p'
/proc/asound/cards
fi
}
filter_amixer_output()
{
sed \
-e '/Unable to find simple control/d' \
-e '/Unknown playback setup/d' \
-e '/^$/d'
}
# The following functions try to set many controls.
# No card has all the controls and so some of the attempts are bound to fail.
# Because of this, the functions can't return useful status values.
# $1 <control>
# $2 <level>
# $CARDOPT
unmute_and_set_level()
{
{ [ "$2" ] && [ "$CARDOPT" ] ; } || bugout
amixer $CARDOPT -q set "$1" "$2" unmute 2>&1 | filter_amixer_output || :
return 0
}
# $1 <control>
# $CARDOPT
mute_and_zero_level()
{
{ [ "$1" ] && [ "$CARDOPT" ] ; } || bugout
amixer $CARDOPT -q set "$1" "0%" mute 2>&1 | filter_amixer_output || :
return 0
}
# $1 <control>
# $2 "on" | "off"
# $CARDOPT
switch_control()
{
{ [ "$2" ] && [ "$CARDOPT" ] ; } || bugout
amixer $CARDOPT -q set "$1" "$2" 2>&1 | filter_amixer_output || :
return 0
}
# $1 <card ID>
sanify_levels_on_card()
{
CARDOPT="-c $1"
unmute_and_set_level "Front" "80%"
unmute_and_set_level "Master" "80%"
unmute_and_set_level "Master Mono" "80%" # See Bug#406047
unmute_and_set_level "Master Digital" "80%" # E.g., cs4237B
unmute_and_set_level "Playback" "80%"
unmute_and_set_level "Headphone" "70%"
unmute_and_set_level "PCM" "80%"
unmute_and_set_level "PCM,1" "80%" # E.g., ess1969
unmute_and_set_level "DAC" "80%" # E.g., envy24, cs46xx
unmute_and_set_level "DAC,0" "80%" # E.g., envy24
unmute_and_set_level "DAC,1" "80%" # E.g., envy24
unmute_and_set_level "Synth" "80%"
unmute_and_set_level "CD" "80%"
mute_and_zero_level "Mic"
# Intel P4P800-MX (Ubuntu bug #5813)
switch_control "Master Playback Switch" on
# Trident/YMFPCI/emu10k1:
unmute_and_set_level "Wave" "80%"
unmute_and_set_level "Music" "80%"
unmute_and_set_level "AC97" "80%"
# DRC:
unmute_and_set_level "Dynamic Range Compression" "80%"
# Required at least for Via 823x hardware on DFI K8M800-MLVF
Motherboard with kernels 2.6.10-3/4 (see ubuntu #7286):
switch_control "IEC958 Capture Monitor" off
# Required on some notebooks with ICH4:
switch_control "Headphone Jack Sense" off
switch_control "Line Jack Sense" off
# Some machines need one or more of these to be on;
# others need one or more of these to be off:
#
# switch_control "External Amplifier" on
# switch_control "Audigy Analog/Digital Output Jack" on
# switch_control "SB Live Analog/Digital Output Jack" on
return 0
}
# $1 <card ID> | "all"
sanify_levels()
{
TTSDML_RETURNSTATUS=0
case "$1" in
all)
for CARD in $(echo_card_indices) ; do
sanify_levels_on_card "$CARD" || TTSDML_RETURNSTATUS=1
done
;;
*)
sanify_levels_on_card "$1" || TTSDML_RETURNSTATUS=1
;;
esac
return $TTSDML_RETURNSTATUS
}
# $1 <card ID>
preinit_levels_on_card()
{
CARDOPT="-c $1"
# Silly dance to activate internal speakers by default on PowerMac
# Snapper and Tumbler
id=`cat /proc/asound/card$1/id 2>/dev/null`
if [ "$id" = "Snapper" -o "$id" = "Tumbler" ]; then
switch_control "Auto Mute" off
switch_control "PC Speaker" off
switch_control "Auto Mute" on
fi
}
# $1 <card ID> | "all"
preinit_levels()
{
TTSDML_RETURNSTATUS=0
case "$1" in
all)
for CARD in $(echo_card_indices) ; do
preinit_levels_on_card "$CARD" || TTSDML_RETURNSTATUS=1
done
;;
*)
preinit_levels_on_card "$1" || TTSDML_RETURNSTATUS=1
;;
esac
return $TTSDML_RETURNSTATUS
}
# $1 <card ID>
mute_and_zero_levels_on_card()
{
CARDOPT="-c $1"
for CTL in \
Master \
PCM \
Synth \
CD \
Line \
Mic \
"PCM,1" \
Wave \
Music \
AC97 \
"Master Digital" \
DAC \
"DAC,0" \
"DAC,1" \
Headphone \
Playback
do
mute_and_zero_level "$CTL"
done
for CTL in \
"Audigy Analog/Digital Output Jack" \
"SB Live Analog/Digital Output Jack"
do
switch_control "$CTL" off
done
return 0
}
# $1 <card ID> | "all"
mute_and_zero_levels()
{
TTZML_RETURNSTATUS=0
case "$1" in
all)
for CARD in $(echo_card_indices) ; do
mute_and_zero_levels_on_card "$CARD" ||
TTZML_RETURNSTATUS=1
done
;;
*)
mute_and_zero_levels_on_card "$1" || TTZML_RETURNSTATUS=1
;;
esac
return $TTZML_RETURNSTATUS
}
# $1 <card ID> | "all"
card_OK()
{
[ "$1" ] || bugout
if [ "$1" = all ] ; then
[ -d /proc/asound ]
return $?
else
[ -d "/proc/asound/card$1" ] || [ -d "/proc/asound/$1" ]
return $?
fi
}
# If a card identifier is provided in $2 then regard it as an error
# if that card is not present; otherwise don't regard it as an error.
case "$1" in
start)
EXITSTATUS=0
TARGET_CARD="$2"
case "$TARGET_CARD" in
""|all) TARGET_CARD=all ; log_action_begin_msg "Setting up ALSA" ;;
*) log_action_begin_msg "Setting up ALSA card ${TARGET_CARD}" ;;
esac
card_OK "$TARGET_CARD" || log_action_end_msg_and_exit "$( [ ! "$2" ] ;
echo $? ; )" "none loaded"
preinit_levels "$TARGET_CARD" || EXITSTATUS=1
if ! restore_levels "$TARGET_CARD" ; then
sanify_levels "$TARGET_CARD" || EXITSTATUS=1
restore_levels "$TARGET_CARD" >/dev/null 2>&1 || :
fi
log_action_end_msg_and_exit "$EXITSTATUS"
;;
stop)
EXITSTATUS=0
TARGET_CARD="$2"
case "$TARGET_CARD" in
""|all) TARGET_CARD=all ; log_action_begin_msg "Shutting down ALSA" ;;
*) log_action_begin_msg "Shutting down ALSA card ${TARGET_CARD}" ;;
esac
card_OK "$TARGET_CARD" || log_action_end_msg_and_exit "$( [ ! "$2" ] ;
echo $? ; )" "none loaded"
store_levels "$TARGET_CARD" || EXITSTATUS=1
mute_and_zero_levels "$TARGET_CARD" || EXITSTATUS=1
log_action_end_msg_and_exit "$EXITSTATUS"
;;
restart|force-reload)
EXITSTATUS=0
$0 stop || EXITSTATUS=1
$0 start || EXITSTATUS=1
exit $EXITSTATUS
;;
reset)
TARGET_CARD="$2"
case "$TARGET_CARD" in
""|all) TARGET_CARD=all ; log_action_begin_msg "Resetting ALSA" ;;
*) log_action_begin_msg "Resetting ALSA card ${TARGET_CARD}" ;;
esac
card_OK "$TARGET_CARD" || log_action_end_msg_and_exit "$( [ ! "$2" ] ;
echo $? ; )" "none loaded"
preinit_levels "$TARGET_CARD"
sanify_levels "$TARGET_CARD"
log_action_end_msg_and_exit "$?"
;;
*)
echo "Usage: $MYNAME {start [CARD]|stop [CARD]|restart [CARD]|reset
[CARD]}" >&2
exit 3
;;
esac
--
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