I am trying to read the raw data from a WAV file that I am using for storing data logger information. Using a test WAV file with nothing but silence, I do not get the expected all 0 results. I have tried different unpack formats but nothing seems to work any better. My test files are made in "Audacity" using the "generate silence" function. I am testing with mono files so there should just be a series of 16 bit signed integers. The dumped data shows that Audio::WAV sees the file as mono with the correct sample rate and bit depth. All suggestions welcomed. 
use strict;
use Audio::Wav;
use Cwd;
use Data::Dumper;

my $path = getcwd;
my $wav = new Audio::Wav;
my $test = 'test.wav';
my $read = $wav -> read($test);

my $details = $read -> details();
print Data::Dumper->Dump([ $details ]);

my $total = 0;
my $buffer = 2;
my $length = $read -> length();
while ( $total < $length ) {
    $total += $buffer;
    my $data = $read -> read_raw( $buffer );
    my $value = unpack('s',$data);
    my $sample = $total/2;
    print "\nsample $sample value $value ";
}

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In reply to Audio::WAV data problem by spencoid

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