#!/usr/bin/perl

use strict;
use warnings;

# input device
my $input = "/dev/dsp1";

# open filehandler
open(my $fh, '<', $input) or die("ERROR open $input ($!)\n");
binmode($fh);

while(1) {
	my $buffer;

	# read one byte
	read($fh, $buffer, 1);

	if(defined($buffer)) {
		# ignore
	}
	else {
		print "nothing to collect\n";
	}
}

close($fh);