ACCEPT_KEYWORDS="~x86" USE="sse2 cue aac ffmpeg flac gnome icecast jack lame midi sndfile vorbis wavpack" emerge -pv audacious audacious-plugins

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] media-sound/audacious-2.2  USE="nls session sse2 (-altivec) -chardet -libsamplerate" 0 kB
[ebuild   R   ] media-plugins/audacious-plugins-2.2-r2  USE="aac alsa cue ffmpeg flac gnome icecast jack lame midi mp3 nls sndfile sse2 vorbis wavpack -adplug -bs2b -cdda -esd -fluidsynth -ipv6 -lirc -mtp -oss -projectm -pulseaudio -scrobbler -sdl -sid" 0 kB

Total: 2 packages (2 reinstalls), Size of downloads: 0 kB