High Quality Content by WIKIPEDIA articles! Gravis UltraSound or GUS is a sound card for the IBM PC compatible system platform, made by Canada-based Advanced Gravis Computer Technology Ltd. It was very popular in the demo scene in the 1990s, due to its superior sound quality compared to similarly-priced soundcards of its time. The Gravis UltraSound was unique at the time of its launch with its use of 'wavetable' sample-based music synthesis technology on the IBM PC platform - the ability to use real-world sound recordings rather than artificial computer-generated waveforms to base a musical instrument on; so a piano sounds like an actual real piano, a trumpet like an actual trumpet, etc. The GUS was remarkable for MIDI playback quality with a large set of instrument patches that could be stored in its own RAM, having up to 32 hardware audio channels. The cards were very agreeably priced, although a little more expensive than Creative cards; they undercut many equivalent professional cards aimed at musicians by a huge margin, and brought CD quality audio reproduction within the grasp of home PC users.

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