Unpack the source tarball wavlevel-0.1.tar.gz in any directory by typing
gunzip wavlevel-0.1.tar.gz
tar -xvf wavlevel-0.1.tar
cd wavlevel-0.1

Since WAVLEVEL and WAVFADE do not use any extraordinary libraries only a 
very simple Makefile exists. (no configure scripts)
The default install path for the two emerging binaries is /usr/local/bin which
can be changed by altering the $(BININSTALL) makro in the Makefile.

To compile and install the programms type
make clean depend all install

To get rid of them again type
make uninstall