These are midi clips so the sound quality and the actual instruments used depend on the instruments you have installed on your computer to play them. So for instance if a violin is used, then you will probably hear some version of a violin sound but the actual sound you hear for the violin will depend on your computer setup, or the plug in your browser uses for midi clips (e.g. QuickTime).
bird calls with Afro-Caribbean percussion
Version 2.4 of Tune Smithy was reviewed in October's edition of Sound On Sound 2004, with particular attention played to its fractal tune generating possibilities. (clips for the tunes he mentions also given separately below).
"The final stage in the journey is the Fractal Tune - a combination of Scale, Arpeggio and Musical Seed, plus a choice of one or more instruments across multiple MIDI channels. Using the Play button now generates continuous, ever-changing tunes based on your settings. If you want impressionistic flurries and cascades of notes, try 'Rushes blown in a storm' or 'echo effects in rests'. More extreme examples include Fibonacci rain shower', the unsettling 'Paleolithic field recording', and 'bird calls with Afro-Caribbean percussion'.
To read the complete article, go here:
http://www.soundonsound.com/sos/Oct04/articles/pcmusician.htm