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    <p>The WAVE (.wav) file contain a header, which indicates the formatting information of the audio file's data. Following the header is the actual audio raw data. You can check their exact meaning below. </p> <pre><code>Positions Typical Value Description 1 - 4 "RIFF" Marks the file as a RIFF multimedia file. Characters are each 1 byte long. 5 - 8 (integer) The overall file size in bytes (32-bit integer) minus 8 bytes. Typically, you'd fill this in after file creation is complete. 9 - 12 "WAVE" RIFF file format header. For our purposes, it always equals "WAVE". 13-16 "fmt " Format sub-chunk marker. Includes trailing null. 17-20 16 Length of the rest of the format sub-chunk below. 21-22 1 Audio format code, a 2 byte (16 bit) integer. 1 = PCM (pulse code modulation). 23-24 2 Number of channels as a 2 byte (16 bit) integer. 1 = mono, 2 = stereo, etc. 25-28 44100 Sample rate as a 4 byte (32 bit) integer. Common values are 44100 (CD), 48000 (DAT). Sample rate = number of samples per second, or Hertz. 29-32 176400 (SampleRate * BitsPerSample * Channels) / 8 This is the Byte rate. 33-34 4 (BitsPerSample * Channels) / 8 1 = 8 bit mono, 2 = 8 bit stereo or 16 bit mono, 4 = 16 bit stereo. 35-36 16 Bits per sample. 37-40 "data" Data sub-chunk header. Marks the beginning of the raw data section. 41-44 (integer) The number of bytes of the data section below this point. Also equal to (#ofSamples * #ofChannels * BitsPerSample) / 8 45+ The raw audio data. </code></pre> <p>I copied all of these from <a href="http://www.topherlee.com/software/pcm-tut-wavformat.html" rel="nofollow noreferrer">http://www.topherlee.com/software/pcm-tut-wavformat.html</a> here</p>
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