GNUsound is a sound editor for Linux/x86. It supports multiple tracks,
multiple outputs, and 8, 16, or 24/32 bit samples. It can read a
number of audio formats through libaudiofile, and saves them as WAV.
Version 0.4 adds support for (most) LADSPA plugins. To protect against
buggy plugins an emergency-save-on-crash feature was added. The most
important configuration settings can now be changed from within the
GUI without recompiling GNUsound.
http://awacs.dhs.org/software/gnusound