Who invented the digital DJ turntables software?

The world's very first DJ turntables software named Retrogrooves was invented by great inventor André Gray and released in the interactive CD-ROM format on February 28, 1989 and featured the customary two turntables (left and right), a cross-fader, two volume controllers, two detached speakers and a record crate replete with 40 albums consisting of 1960's soul, funk, disco and experimental electronic music from the 1970's. Not having a barcode, Retrogrooves was sold in primarily mom and pop record stores in the USA and heavily bootlegged in Europe. Retrogrooves, introduced the world to interactive music, democratized DJing and contributed greatly to the rise of EDM: electronic dance music (production & live performances), made a DJ out of everyone, had an immense impact upon hip hop music (production & live performances) and served as the template and grandfather for all future digital DJ turntables software, the first of which did not appear for a more than a dozen years in 2002.