I installed qCommand to execute a script as root (real bash is installed).
#!/bin/sh
PIDtoKill=`ps axuw|grep adsprpcd|grep audiopd|grep -v grep|grep -v restart|awk '{print $1}'|grep '[0-9]'|grep '^[0-9]*$'`
if [ "x$PIDtoKill" != "x" ]
then
#echo "PIDtoKill: $PIDtoKill"
#kill -9 $PIDtoKill 2> /dev/null 1> /dev/null
kill -15 $PIDtoKill
fi
So, a normal user can just tap a few times on the screen and have call audio again.
This is faster than rebooting.