Ad Lib, Inc. was a Canadian manufacturer of sound cards founded by Martin Prevel, a former professor of music and vice-dean of the music department at the Université Laval in Quebec City. Ad Lib’s best known product was an eponymously named sound card, the first add-on sound card for the IBM PC and compatibles to achieve widespread acceptance. It became a de facto standard.
Ad Lib bankruptcy: May 1, 1992










