#!/bin/zsh
setopt force_float
export freq=$1
export len=$2
if [ -z $freq -o -z $len ];then
echo usage: $0 \<freequency in hurtz\> \<length in ms\>
exit 1
fi
export file=`mktemp`
sox -n -t wav $file -q synth square $freq trim 0 $(($len/1001)) vol 0.15
play -q $file
rm $file
