GRUB
From ThorxWiki
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m (updated script) |
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<pre> |
<pre> |
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| − | #!/bin/bash |
+ | #!/bin/bash |
| − | if [ $# -lt 3 ]; then |
+ | if [ $# -lt 3 ]; then |
| − | echo "Usage: $0 tempo freq dur [freq dur freq dur...]" >&2 |
+ | echo "Usage: $0 tempo freq dur [freq dur freq dur...]" >&2 |
| − | exit 1 |
+ | exit 1 |
| − | fi |
+ | fi |
| − | tempo=$1; shift |
+ | tempo=$1; shift |
| − | while [ -n "$*" ]; do |
+ | while [ -n "$*" ]; do |
| − | freq=$1; shift |
+ | freq=$1; shift |
| − | [ $freq -eq 0 ] && freq=1 # beep will fail if $freq is 0 |
+ | [ $freq -eq 0 ] && freq=1 # beep will fail if $freq is 0 |
| − | dur=$1; shift |
+ | dur=$1; shift |
| − | dur=$((120000*$dur/$tempo)) |
+ | dur=$((60000*$dur/$tempo)) |
| − | # ie, 2 * 60 (bpm) * 1000 (for milliseconds) * duration / tempo |
+ | # ie, 60 (bpm) * 1000 (for milliseconds) * duration / tempo |
| − | # No, I don't know why that 2* has to be there initially, but it makes it sound right to beep on my laptop at least :) |
+ | # Note: on one of my systems, i had to double it (ie, 12000*). I don't |
| − | BEEPOPTS="$BEEPOPTS $NEXT -f $freq -l $dur" |
+ | # know why, but it makes some of the tunes I've collected sound right. |
| − | NEXT="-n" |
+ | # (note: I have not tested all tunes in GRUB) |
| − | done |
+ | # |
| + | # You can generate a single beep command here, but I prefer to step it |
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| + | # out since [a] sounds slightly closer to GRUB implementation |
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| + | # and [b] easier to debug an off-note |
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| + | # BEEPOPTS="$BEEPOPTS $NEXT -f |
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| + | # $freq -l $dur" |
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| + | # NEXT="-n" |
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| + | echo "beep -f $freq -l $dur" |
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| + | beep -f $freq -l $dur |
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| + | done |
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| − | beep $BEEPOPTS |
+ | #echo "playing beep $BEEPOPTS" |
| + | |||
| + | #beep $BEEPOPTS |
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</pre> |
</pre> |
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Revision as of 12:39, 22 May 2012
Some GRUB_INIT_TUNE themes I've found online in various places... this is a fragment from my debian:/etc/default/grub file
# Uncomment to get a beep at grub start # The format unless a file is named is: "tempo [pitch1 duration1] [pitch2 duration2] ..." # Warning: The menu will not be displayed until the tone is finished #GRUB_INIT_TUNE="480 440 1" # Close Encounters/5 Tone: #GRUB_INIT_TUNE="480 900 2 1000 2 800 2 400 2 600 3" # Fur Elise (note long): #GRUB_INIT_TUNE="480 420 1 400 1 420 1 400 1 420 1 315 1 370 1 335 1 282 3 180 1 215 1 282 1 315 3 213 1 262 1 315 1 335 3 213 1 420 1 400 1 420 1 400 1 420 1 315 1 370 1 335 1 282 3 180 1 215 1 282 1 315 3 213 1 330 1 315 1 282 3" # Super Mario #GRUB_INIT_TUNE="1000 334 1 334 1 0 1 334 1 0 1 261 1 334 1 0 1 392 2 0 4 196 2" # Star Wars Imperial Death March: #GRUB_INIT_TUNE="480 440 4 440 4 440 4 349 3 523 1 440 4 349 3 523 1 440 8 659 4 659 4 659 4 698 3 523 1 415 4 349 3 523 1 440 8" # Wolfenstein 3D GRUB_INIT_TUNE="300 131 1 196 1 196 1 196 1 294 1 196 1 294 1 196 1 131 1"
This tip which converts a GRUB_INIT_TUNE to a audio file which sox will play through the soundcard...
http://ubuntuforums.org/showthread.php?t=1739495
Based on this script, I've concoted the following, which converts a GRUB_INIT_TUNE into a beep(1) command, to play it through the PC speaker - as grub intended.
#!/bin/bash
if [ $# -lt 3 ]; then
echo "Usage: $0 tempo freq dur [freq dur freq dur...]" >&2
exit 1
fi
tempo=$1; shift
while [ -n "$*" ]; do
freq=$1; shift
[ $freq -eq 0 ] && freq=1 # beep will fail if $freq is 0
dur=$1; shift
dur=$((60000*$dur/$tempo))
# ie, 60 (bpm) * 1000 (for milliseconds) * duration / tempo
# Note: on one of my systems, i had to double it (ie, 12000*). I don't
# know why, but it makes some of the tunes I've collected sound right.
# (note: I have not tested all tunes in GRUB)
#
# You can generate a single beep command here, but I prefer to step it
# out since [a] sounds slightly closer to GRUB implementation
# and [b] easier to debug an off-note
# BEEPOPTS="$BEEPOPTS $NEXT -f
# $freq -l $dur"
# NEXT="-n"
echo "beep -f $freq -l $dur"
beep -f $freq -l $dur
done
#echo "playing beep $BEEPOPTS"
#beep $BEEPOPTS
