These mp3s are played using the Roland Sound Canvas, which has sounds perhaps similar to the type of wave table soundcard you get on many computers nowadays.
When you first run it, Tune Smithy will probably play the tunes using the built in midi instruments on your soundcard. You can add extra soft synths or extra hardware devices to get more instrument sounds.
Tunes recorded using the FM7 or Giga
These tunes were recorded using the FM7 synth or the Giga sampler.
Tune Smithy also comes with one or two sounds of its own, in its Wave Shape Player
Freeware / Shareware status: This feature is shareware.
To continue reading about the fractal tunes, go on to the Links with links relevant to the fractal tunes or to composers using them.
You are recommended to try out the program first. If you decide to purchase, you need to buy the Play level. If you want to use a music keyboard with FTS as well, or use it to retune your notaiton software or sequencer, you need the Complete level.
To download the program and take it for a Test drive (start the test drive at any time):