Yikes, When i try and unpack the 16bit sound value right after i pack it, i get a value which is incorrect if the initial value is less than zero. Basically, the unpack("v",...) is not working correctly. Any advice would be appreciated. I want to unpack the value so i can use it when i read in sound. I use this code only to illustrate. This program outputs two different numbers if the initial value of v is below zero. I need it to output the same numbers so i know i am reading the sound file correctly. 
use Win32::Sound;
# Create the object
my $WAV = new Win32::Sound::WaveOut(44100, 16, 1);
my $data = ""; 
my $counter = 0;
my $increment = 440/44100;
# Generate 44100 samples ( = 1 second)
for my $i (1..44100) {
    # Calculate the pitch 
    # (range 0..65335 for 16 bits)
  $v = int(sin($counter/2*3.14) * (65335/2));
  #signed integer (v) range -32768 <-> 32767
print "$v = ".unpack("v",pack("v", $v))."\n";
    $data .= pack("v", $v);
  $counter += $increment;
}
$WAV->Load($data);       # get it
$WAV->Write();           # hear it
1 until $WAV->Status();  # wait for completion
$WAV->Save("16.wav"); # write to disk
$WAV->Unload();          # drop it

exit;

[download]
thanks to all for help and for reading.
jtrue

In reply to Unpacking 16bit sound by true
in thread Win32::Sound 16 bit example by true

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