Wavosaur is a free sound editor, audio editor, wav editor software for editing, processing and recording sounds, wav and mp3 files.
Traverso DAW is a free multitrack audio recording and editing program which is very well suited to record a single voice, a band, an ensemble, a whole orchestra or any other source of music !
Sweep is an audio editor and live playback tool for GNU/Linux, BSD and compatible systems. It supports many music and voice formats including WAV, AIFF, Ogg Vorbis, Speex and MP3, with multichannel editing and LADSPA effects plugins.
Acoustica is a comprehensive audio editor for recording, editing, mixing and mastering.
Power Sound Editor Free is a visual audio editing and recording software solution, which supports many advanced and powerful operations with audio data.