Packages with the ao use flag

Global definition: Use libao audio output library for sound playback.

app-accessibility / speech-dispatcher : Speech synthesis interface

app-dicts / ydpdict : Interface for the Collins Dictionary

app-emulation / fuse : Free Unix Spectrum Emulator by Philip Kendall

games-emulation / higan : Multi-system emulator focused on accuracy, preservation, and configurability

gnustep-apps / cynthiune : Free software and romantic music player for GNUstep

media-libs / libtimidity : MIDI to WAVE converter library

media-sound / cmus : Ncurses based music player with plugin support for many formats

media-sound / herrie : Herrie is a command line music player

media-sound / mpd : The Music Player Daemon (mpd)

media-sound / potamus : A lightweight audio player with an emphasis on high audio quality

media-sound / sox : The swiss army knife of sound processing programs

media-sound / timidity++ : A handy MIDI to WAV converter with OSS and ALSA output support

media-sound / xmms2 : X(cross)platform Music Multiplexing System, next generation of the XMMS player

net-misc / rdesktop : A Remote Desktop Protocol Client

sci-mathematics / giac : A free C++ Computer Algebra System library and its interfaces

x11-wm / icewm : Ice Window Manager with Themes