4>Example (Audio playback)</h4>
<pre>
<span class="c">/*------------------------------------------------------------------------*/</span>
<span class="c">/* Sample code of data transfer function to be called back from f_forward */</span>
<span class="c">/*------------------------------------------------------------------------*/</span>

UINT out_stream (   <span class="c">/* Returns number of bytes sent or stream status */</span>
    const BYTE *p,  <span class="c">/* Pointer to the data block to be sent */