Ecawave is a simple graphical audio file editor.
Ecawave supports all audio file formats and effect algorithms provided by Ecasound libraries. This includes JACK, ALSA, OSS, aRts, over 20 file formats, over 30 effect types, LADSPA plugins and multi-operator effect presets.
First of all, you should first try to use the binary-rpm release. It's probably the easiest and the most straigthforward way to install this software.
If you need to compile ecawave, the file 'INSTTALL' will give you the instructions.