sound sound@gentoo.org Gentoo Sound Team Applies the aoTuV patches. Aoyumi's Tuned Vorbis is a third-party patchset that improves the vorbis encoding quality. A previous version of the aoTuV patchset has already been merged with the official libvorbis release. The current patchset especially improves encoding quality at low bitrate settings, and is very likely to be merged at some point in the future. It is recommended that all users enable this useflag.