POSIX compliant UNIX system; tested with various combinations of Linux 2.2.x/2.4.x and glibc 2.1.x/2.2.x, FreeBSD 4.x
standard C++ runtime environment; tested with libstdc++ 2.9/2.10, 3.x and 4.x
POSIX threads; tested with linuxthreads 0.7 (libpthread, comes with glibc)
qt 2.x/3.x runtime libraries

Optional packages:
for soundcard input/output: JACK, ALSA drivers, OSS or OSS/Lite
for higher quality resampling: libsamplerate
for mp3 support, mpg123 (input) and lame (output) packages
for .aiff and .au/.snd support, Audiofile SGI audio file library
for tracker module support, MikMod module player
for ogg support, the vorbis-tools package
for .mid file input Timidity++
for aRts support - aRts server pacakge

To compile ecawave, you also need...:
standard C++ build environment; tested with gcc 2.91.66, 2.95.3, 3.0.x, 3.1.x and 3.2 (STL and exceptions need to be supported)
GNU make, automake, autoconf and libtool packages
binutils-2.9.1.0.15 or newer (exceptions won't work with older ones)
qt 2.x/3.x development environment
ecasound development files