Use the 3DNow! instruction set
Name Category Description
bochs app-emulation LGPL-ed pc emulator
Class-Member dev-perl A set of modules to make the module developement easier
ffmpeg media-video Complete solution to record/convert/stream audio and video. Includes libavcodec
flac media-libs free lossless audio encoder and decoder
freeverb3 media-libs Reverb and Impulse Response Convolution plug-ins (Audacious/JACK)
gromacs sci-chemistry The ultimate molecular dynamics simulation package
jack-audio-connection-kit media-sound A low-latency audio server
libsdl2 media-libs Simple Direct Media Layer
mpg123 media-sound a realtime MPEG 1.0/2.0/2.5 audio player for layers 1, 2 and 3
mplayer media-video Media Player for Linux
swh-plugins media-plugins Large collection of LADSPA audio plugins/effects
transcode media-video Utilities for transcoding video and audio codecs in different containers

Thank you!