german@Debian:~$ type chan
chan is a function
chan ()
{
    if [ -z $1 ]; then
        play /usr/share/sounds/chan.mp3 >&/dev/null;
    else
        for ((i=0; i<$1; i++))
        do
            play /usr/share/sounds/chan.mp3 >&/dev/null;
        done;
    fi
}
german@Debian:~$