00, 20, 20000, 1))
: fi.lowpass(3, hslider("hifreq", 2000, 20, 20000, 1));

--></faust-editor>
<br>
</div>
<!-- /faust-run -->

<h3 id="example-5-resonant">Example 5: resonant</h3>
<p>A resonant filter amplifies a selected frequency range: </p>
<!-- faust-run -->
<div class="faust-run"><img src="exfaust40/exfaust40.svg" class="mx-auto d-block">
<faust-editor><!--

import("stdfaust.lib");

process = no.noise * hslider("noise", 0.5, 0, 1, 0.01) 
        : fi.resonlp(hslider("hifreq", 400, 20, 20000, 1),
     