13 lines
356 B
Bash
Executable File
13 lines
356 B
Bash
Executable File
#!/bin/sh
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lock=/tmp/.beep-lock
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test -f $lock && exit 1 || touch $lock
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head -c 4 /dev/urandom | \
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hexdump -v -e '/1 "%u\n"' | \
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awk '{ split("0,3,5,6,7,10,12",a,","); \
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for (i = 0; i < 1; i+= 0.00011) \
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printf("%08X\n", 40*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' | \
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xxd -r -p | \
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aplay -c 2 -f S16_LE -r 48000 -Dplug:hdmi1
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rm -f $lock
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