scripts/beep: unify scripts

scripts/beep

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+n=3
+case "$5" in
+  LOW)      n=1  ;;
+  NORMAL)   n=3  ;;
+  CRITICAL) n=5;;
+esac
+
+lock=/tmp/.beep-lock
+test -f $lock && exit 1
+touch $lock
+
+python -c "
+import sys, numpy as np
+t = np.arange(0, 0.25, 1/48000)
+for i in range($n):
+  tone = np.random.choice([0,3,5,6,7,10,12])
+  note = 0.2 * np.sin(np.pi * 650 * 2**(tone/12) * t)
+  sys.stdout.buffer.write(np.int32(2**31 * note).tobytes())
+" | aplay -c 1 -f S32_LE -r 48000 -Dbeep
+
+rm -f $lock

scripts/beep-charlie

@@ -1,15 +0,0 @@
-#!/bin/sh
-
-lock=/tmp/.beep-lock
-test -f $lock && exit 1
-touch $lock
-
-head -c 8 /dev/urandom |
-   hexdump -v -e '/1 "%u\n"' |
-   awk '{ split("0,3,5,6,7,10,12",a,",");
-   for (i = 0; i < 1; i+= 0.00012)
-   printf("%08X\n", 60*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' |
-   xxd -r -p |
-   aplay -c 1 -f S32_LE -r 48000 -D plug:default
-
-rm -f $lock

scripts/beep-wigfrid

@@ -1,15 +0,0 @@
-#!/bin/sh
-
-lock=/tmp/.beep-lock
-test -f $lock && exit 1
-touch $lock
-
-head -c 4 /dev/urandom | \
-   hexdump -v -e '/1 "%u\n"' |
-   awk '{ split("0,3,5,6,7,10,12",a,",");
-   for (i = 0; i < 1; i+= 0.00011)
-   printf("%08X\n", 40*sin(450*exp((a[$1 % 8]/12)*log(2))*i)) }' |
-   xxd -r -p |
-   aplay -c 2 -f S16_LE -r 48000 -Dvideocard
-
-rm -f $lock