Alex Rosner is an American sound engineer and designer. [1] He is known as the sound designer for the club The Loft and as the inventor of the DJ mixer. [2]
Rosner and his father survived the Holocaust and time at Dachau. [2] After the war the family moved to Queens, New York. [2] He received a degree in engineering from Rensselaer Polytechnic Institute. [2]
Rosner got started building Hi-Fi systems while a student in electrical engineering. [3] He built stereophonic discotheques at the 1964-65 World's Fair. [3] This was the world's first stereophonic system. [4]
Rosner opened his business, Rosner Custom Audio, in 1967. [2] He had a long collaboration with David Mancuso. [3] Rosner prototyped the first mixer in 1965, as a way to transition between vinyl records. [5] He designed systems for Directoire, the Ginza, the Limelight, Max's Kansas City, Shepheard's, Tambuorine, and Tamburlaine. [3] Rosner's systems survive at Riverside Cathedral and St. John the Divine churches in New York. [2]