---
title: "WAVC file format"
---
    <div class="title_main">WAVC file format</div>
    <br />
    <div class="fileHeader">Applies to:</div>
    <div class="indent1">BG1, BG1: TotS, BG2, BG2: ToB, PST, IWD, IWD:HoW, IWD:TotL, IWD2</div><br />
    
    <div class="fileHeader">General Description</div>
    <div class="indent1">
      WAVC files contain sounds used within the game. Unlike ACM files, WAVC can be played from either the override folder or BIF files. WAVC files are 22050 Hz, 16 bits, and must be renamed to *.WAV before being used in the game. The IE plays WAVC files at twice the speed of the original WAV file.  
    </div>
    <br />
    
    <div class="fileHeader">Detailed Description</div>
    <div class="indent1">
      WAVC is the sound file format used in Infinity Engine. The file is simply an ACM file with the following additional header attached.<br />
      <br />
      <table border="1" width="98%">
        <colgroup>
          <col width="5%" />
          <col width="12%" />
           <col width="*" />
        </colgroup>
        <thead>
          <tr>
            <th>Offset</th>
            <th>Size (data type)</th>
            <th>Description</th>
          </tr>
        </thead>
        <tr>
          <td>0x0000</td>
          <td>4 (char array)</td>
          <td>Signature ('WAVC')</td>
        </tr>
        <tr>
          <td>0x0004</td>
          <td>4 (char array)</td>
          <td>Version ('V1.0')</td>
        </tr>
        <tr>
          <td>0x0008</td>
          <td>4 (dword)</td>
          <td>Uncompressed size of file</td>
        </tr>
        <tr>
          <td>0x000a</td>
          <td>4 (dword)</td>
          <td>Compressed size of file</td>
        </tr>
        <tr>
          <td>0x0010</td>
          <td>4 (dword)</td>
          <td>Pointer to ACM data (usu. 0x1c)</td>
        </tr>
        <tr>
          <td>0x0014</td>
          <td>2 (word)</td>
          <td>Number of sound channels (usu. 1)</td>
        </tr>
        <tr>
          <td>0x0016</td>
          <td>2 (word)</td>
          <td>Number of bits per sample (usu. 16-bit)</td>
        </tr>
        <tr>
          <td>0x0018</td>
          <td>2 (word)</td>
          <td>Sample rate (usu. 22050 Hz)</td>
        </tr>
        <tr>
          <td>0x001a</td>
          <td>2 (word)</td>
          <td>Unused (usu. 0x777e)</td>
        </tr>
        <tr>
          <td>0x001c</td>
          <td>4 (bytes)</td>
          <td>Standard ACM header (0x97280301)</td>
        </tr>
      </table>
    </div>
  </div>
</div>