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OVERVIEW

    EWF stands for "Echo Waveform Format" and it's the format in which PCM
    instruments are stored.

FORMAT

    There isn't much to it. PCM data is stored as unsigned 8-bit, 10250 Hz,
    mono. The bytes specifying the waveform data contain values ranging from
    $00 to $FE. When a byte with value $FF is found, this is the end of the
    waveform.

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