GNUsound is a sound editor for GNU/Linux. It supports multiple tracks, multiple outputs, and 8, 16, or 24/32-bit samples. It can read and write many audio formats through a number of supported file format libraries (such as AudioFile, libsndfile, and libmp3lame), and it can extract audio from a variety of video files through FFmpeg. It supports OSS, ALSA, or JACK for playback/capture, as well as a large number of high-quality audio effects through the LADSPA plugin architecture.
