Ampex machine's high price tag. Ampex sold only about 50 or 60 ATR-124 machines, and withdrew from the professional audio tape recorder market entirely in 1983. By the 1990s, Ampex focused more on video recorders, instrumentation recorders, and data recorders. In 1991, Ampex sold their professional audio recorder line to Sprague Magnetics. The Ampex Recording Media Corporation spun off in 1995 as Quantegy Inc.; that company has ceased producing recording tape. Starting in the early 1950s, RCA, Bing Crosby and others tried to record analog video on very fast-moving magnetic tape. As early as 1952, Ampex developed prototype video tape recorders
International Video Corporation & mastering system of their own design starting in the late 1970s, one of the first systems introduced for recording digital audio. Besides VTRs, IVC also manufactured other types of video equipment, such as studio video cameras. They also produced modified video recorders for use in medical and data storage applications. International Video Corporation International Video Corporation, or IVC, was a California company that manufactured several models of low to middle-end videotape recorders, or VTRs, for industrial and professional use. Their products were quite popular in the industrial and institutional markets. IVC 800 series 1 Inch VTR was very popular.