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RealSound is a patented (US US5054086 A) technology for the PC created by Steve Witzel of Access Software during the late 1980s.〔http://www.joeylatimer.com/pdf/Compute!%20April%201990%20PC%20Sound%20Gets%20Serious%20by%20Joey%20Latimer.pdf〕 RealSound enables 6-bit〔(【引用サイトリンク】 title=The Best Sound You've Never Heard )〕 digitized PCM-audio playback on the PC speaker by means of PWM drive, allowing software control of the loud speaker's amplitude of displacement. The first video games to use it were ''World Class Leader Board'' and ''Echelon'', both released in 1988. At the time of release, sound cards were very expensive and RealSound allowed players to hear lifelike sounds and speech with no additional sound hardware, just the standard PC speaker.〔(PC Mag - Google Livros )〕 RealSound was an impressive enough technology that a few other PC video game developers, like Legend Entertainment, licensed it for use in their own games. However, as the early 1990s progressed, sound card prices dropped to the point that they eventually became a baseline requirement for gaming PC-audio, leaving RealSound obsolete as it no longer filled a niche in the market. ==Examples of games using RealSound== * Access Software: * * ''World Class Leader Board'' (1988)〔(PC Mag - Google Livros )〕 * * ''Echelon'' (1988) * * ''Mean Streets'' (1989) * * ''Countdown'' (1990) * * ''Crime Wave'' (1990) * * ''Links'' (1990) * * ''Martian Memorandum'' (1991) * * ''Amazon: Guardians of Eden'' (1992) * Legend Entertainment: * * ''Spellcasting 101'' (1990) * * ''Spellcasting 201'' (1991) * * ''Spellcasting 301'' (1992) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「RealSound」の詳細全文を読む スポンサード リンク
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