Global USE flags

Flag	Description	Packages
alsa		6
debug		6
doc	Install the depends needed to build the doc	8
examples		3
freebob	Adds support for the 'BridgeCo enhanced breakout box' aka 'BeBoB'	0
freesound	Add support direct searching and download of samples from Freesound	0
jack		7
jackmidi	Enable for the JACK-MIDI API from jack-audio-connection-kit	0
ladspa		2
lv2	Add support for Ladspa V2	3
opengl		2
oss		4
postgresql	Adds support for the PostgreSQL database server	0
pulseaudio		2
vst	Adds support for win32 vst's (Steinbergs virtual studio technology)	2

Category USE flags

media-sound

Flag	Description	Packages
fluidsynth	Enable fluidsynth support	2
gtk		4
lash	Enable lash support	2
portaudio		2
pv	Build and install the phase vocoder pv binary	2

Local USE flags

media-libs

juce

Flag	Description
demo	Build the demo examples
extras	Build the juce utilities
jucer	Build the Projucer IDE

media-plugins

lsp-plugins

Flag	Description
X
test

media-sound

4deckradio

Flag	Description
old	Build against gstreamer-0.10 instead of gstreamer-1.0

alsaplayer

Flag	Description
flac
mad
mikmod
nas
nls
ogg
systray	Enables systray support with gtk
vorbis
xosd

drc

Flag	Description
contrib
double-precision	more precise calculations at the expense of speed

madjack

Flag	Description
qt5

museseq

Flag	Description
dssi	Enable dssi and dssi-vst support
lrdf
osc	Enable OSC support
python
rtaudio
rubberband

psindustrializer

Flag	Description
pulse

pure-data

Flag	Description
experimental	Build binaries for experimental 64 bits double-precision floatsize
extra	Include extra objects (sigmund~, pd~,...) in libpd
fftw
instance	Enable multi-instane support for libpd
libpd	Additionally build libpd
utils	Enable utilities if building libpd
watchdog	Additionally build watchdog

rakarrack-plus

Flag	Description
altivec
carlap	Build Carla presets for lv2 from default banks
nsm	Enable NSM session support
optimization	Enable optimizations
rplus	Build rakarrack-plus
sse
sse2
sysex	Enable Experimental Sysex preset save support
vectorize	Enable vectorize

rsound

Flag	Description
alsammod	Build the ALSA rsound module
alsamod
ao
libsamplerate
openal
vlcmod	Build the vlc module

tuxguitar

Flag	Description
fluidalsa	Use ALSA with the fluidsynth plugin.
fluidjack	Use JACK with the fluidsynth plugin.
fluidoss	Use OSS with the fluidsynth plugin.
fluidpipewire	Use pipewire with the fluidsynth plugin.
fluidportaudio	Use portaudio with the fluidsynth plugin.
fluidpulseaudio	Use pulseaudio with the fluidsynth plugin.
fluidsdl	Use sdl audio with the fluidsynth plugin.
html	Use webkit-gtk instead of the system browser to display the help.
timidity

media-video

cinelerra

Flag	Description
commercial	Commercial capture support
cpu_flags_x86_mmx
festival	app-accessibility/festival support
git_ffmpeg	Use ffmpeg git
vaapi
vdpau

x11-themes

fvwm-crystal

Flag	Description
amixer	Enable alsamixer support (alsa-sound/alsa-utils)
pm-utils	Enable support for suspend/resume the system through sys-power/pm-utils
xdg	Enable xdg localized user directrories support via x11-misc/xdg-user-dirs

---