an style="color: #b0c4de;">:id</span> 2)
<span class="prompt">SCRATCH&gt;</span> (free 1)
<span class="prompt">SCRATCH&gt;</span> (buffer-record-test btest <span style="color: #b0c4de;">:id</span> 1)
<span class="prompt">SCRATCH&gt;</span> (free 1)
<span class="prompt">SCRATCH&gt;</span> (free 2)</pre>

      <p id="fft">
        A low pass brickwall filter is a good example to introduce the FFT
        analysis with <a href="index.html">Incudine</a>. The DSP in the following
        example uses the mouse 