featured on this site is in MIDI format. MIDI
stands for "musical instrument digital
interface." A MIDI's sound ultimately depends
on the user's soundcard. Generally, better
soundcards yield better sounding MIDIs. A
soundcard with a good wave synthesis/emulation give
the best results.
MIDIs may sound different when played on different
computers. Think of a computer as being an
orchestra. The computer's soundcard would act like
their instruments. The sound quality of the music
the orchestra will play depends on the quality of the
instruments they use. Similarly, the quality of
MIDI depends on the quality of the soundcard.