Sweep is an audio editor and live playback tool. It supports many music and voice formats including WAV, AIFF, Ogg Vorbis, Speex, and MP3, with multichannel editing and LADSPA effects plugins. Inside lives a pesky little virtual stylus called Scrubby who enjoys mixing around in your files.
wavnorm is a simple command line utility to destructively maximize or alter the colume of a stereo .wav file. It's handy for making the volumes of a range of .wav files consistent before or after mp3 conversion, audio CD burning, etc. nplay is a simple .wav player with VU meter and peak meter. nrecord is a simple .wav recorder with VU meter and peak meter. Although simple the VU meter greatly aids getting optimum recording quality. nplay and nrecord use the newt text mode library.
Audacity is a cross-platform multitrack audio editor. It allows you to record sounds directly or to import Ogg, WAV, AIFF, AU, IRCAM, or MP3 files. It features a few simple effects, all of the editing features you should need, and unlimited undo. The audio I/O uses PortAudio, which fully supports OSS, Mac OS X CoreAudio, and Windows WMME, and can be compiled with support for ALSA and Jack.
NBC-VBI is a recording tool for the German Radio.MP3 (operated by MusicPlay), which can be received in Germany via NBC Europe (cable network) and uses the vertical blanking interval of television signals to send the MP3-data. NBC-VBI provides automatic MP3-saver-functions, a cover-saver, filter system, dupe-check, and more.