"EBU R128 loudness normalization. Includes both dynamic and linear normalization modes. Support for both single pass (livestreams, files) and double pass (files) modes."
"The XQuartz project is an open-source effort to develop a version of the X Org X Window System that runs on OS X. Together with supporting libraries and applications, it forms the X11 app that Apple shipped with OS X versions 10.5 through 10.7."