.fr/libs/filters/#filowpass">fi.low</a> filter can be defined with an argument that modifies the frequency attenuation slope.</p>
<h3 id="example-3-high-pass">Example 3: high pass</h3>
<p>Here the noise sound is filtered with a <a href="https://en.wikipedia.org/wiki/High-pass_filter">high-pass filter</a> that removes frequencies higher than a selected cutoff frequency: </p>
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import("stdfa