add scripts/beep-wigfrid

2019-08-29 11:09:05 +02:00 · 2019-08-29 11:09:05 +02:00 · d8967e18c2
commit d8967e18c2
parent a9cc955b29
1 changed files with 8 additions and 0 deletions
--- a/scripts/beep-wigfrid
+++ b/scripts/beep-wigfrid
@ -0,0 +1,8 @@
+#!/bin/sh
+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 -Dplug:hdmi1