#!/bin/bash
# make a beep at a given frequency!
if [ $# -lt 3 ];then
  echo "$(tput bold)usage:$(tput sgr0) beep <freq> <seconds> <card#>"
  exit
fi
( speaker-test -t sine -f ${1} -D plughw:${3} -p 1 )& pid=$! ; sleep ${2}s ; kill -9 $pid