+<ul>
+ <li>Peak, which adjusts the gain to bring the highest signal peak to the
+ chosen level (in <acronym title="decibels relative to full scale">dBFS</acronym>),</li>
+ <li>Loudness, which adjusts the gain to bring the average amplitude to the
+ chosen level (in <acronym title="loudness units relative to full scale">LUFS</acronym>),
+ without exceeding the chosen true-peak value (in
+ <acronym title="decibels true peak">dBTP</acronym>).
+ EBU R128 is only available for mono or stereo sounds while true-peak works
+ for any channel layout.</li>
+</ul>