ith a <a href="https://en.wikipedia.org/wiki/Low-pass_filter">low-pass filter</a> that removes frequencies lower than a selected cutoff frequency: </p>
<!-- faust-run -->
<div class="faust-run"><img src="exfaust37/exfaust37.svg" class="mx-auto d-block">
<faust-editor><!--

import("stdfaust.lib");

process = no.noise * hslider("noise", 0.5, 0, 1, 0.01) : fi.lowpass(3, hslider("hifreq", 2000, 20, 20000, 1));

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

<p>The used <a href="https://faustlibraries.grame