[1] He is known as the sound designer for the club The Loft and as the inventor of the DJ mixer.
[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.
[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.