media-sound/sox
The swiss army knife of sound processing programs
USE Flags
alsa
Global: Adds support for media-libs/alsa-lib (Advanced Linux Sound Architecture)
amr
Global: Enables Adaptive Multi-Rate Audio support
Local: Enables Adaptive Multi-Rate Audio support
ao
Global: Use libao audio output library for sound playback
encode
Global: Adds support for encoding of audio or video files
flac
Global: Adds support for FLAC: Free Lossless Audio Codec
id3tag
Global: Enables ID3 tagging with id3tag library
Local: Enables ID3 tagging with id3tag library
ladspa
Global: Enables the ability to support ladspa plugins
mad
Global: Adds support for mad (high-quality mp3 decoder library and cli frontend)
ogg
Global: Adds support for the Ogg container format (commonly used by Vorbis, Theora and flac)
openmp
Global: Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp"
oss
Global: Adds support for OSS (Open Sound System)
opus
* This flag is undocumented *
png
Global: Adds support for libpng (PNG images)
pulseaudio
Global: Adds support for PulseAudio sound server
sndfile
Global: Adds support for libsndfile
sndio
* This flag is undocumented *
twolame
Global: Enables twolame support (MPEG Audio Layer 2 encoder)
wavpack
Global: Add support for wavpack audio compression tools