<page
    xmlns="http://projectmallard.org/1.0/"
    xmlns:its="http://www.w3.org/2005/11/its"
    type="guide"
    id="loudness">
    <info>
        <link type="guide" xref="index#plugins"/>
    </info>
    <title>Loudness Compensator</title>
    <p>
        PulseEffects uses the loudness compensator from Linux Studio Plugins which
        applies equal loudness contour corrections to the input signal. This is a
        measure of sound pressure level (SPL), over the frequency spectrum, for
        which a listener perceives a constant loudness when presented with pure
        steady tones.
    </p>
    <terms>
        <item>
            <title>
                <em style="strong" its:withinText="nested">Input</em>
            </title>
            <p>
                The input gain settings, allows to adjust the level of the input
                signal to the desired level.
            </p>
        </item>
        <item>
            <title>
                <em style="strong" its:withinText="nested">Output</em>
            </title>
            <p>
                The output volume of the signal with applied equal loudness contour,
                controls the loudness of the 1 kHz pure sine wave.
            </p>
        </item>
        <item>
            <title>
                <em style="strong" its:withinText="nested">Standard</em>
            </title>
            <p>
                Allows to select different equal loudness contour standards.
            </p>
        </item>
        <item>
            <title>
                <em style="strong" its:withinText="nested">FFT Size</em>
            </title>
            <p>
                Allows to select size of the fast Fourier transform frame used for
                the processing. The larger FFT frame is, the more precize the curve
                is approximated and the more latency the plugin introduces
            </p>
        </item>
    </terms>
    <section>
        <title>References</title>
        <list>
            <item>
                <p>
                    <link href="https://en.wikipedia.org/wiki/Loudness_compensation"
                        its:translate="no">
                        https://en.wikipedia.org/wiki/Loudness_compensation
                    </link>
                </p>
            </item>
            <item>
                <p>
                    <link
                        href="https://lsp-plug.in/?page=manuals&amp;section=loud_comp_stereo"
                        its:translate="no">
                        https://lsp-plug.in/?page=manuals&amp;section=loud_comp_stereo
                    </link>
                </p>
            </item>
        </list>
    </section>
</page>
