R&B singles "Be Alright", "Dance Floor", "I Can Make You Dance", "Heartbreaker", "It Doesn't Really Matter" and "Computer Love". Throughout Zapp's history, around 15 musicians participated. In 1993, Zapp released their biggest-selling album: Zapp & Roger: All the Greatest Hits. It featured remixed cuts of Troutman's solo singles along with a new single "Slow and Easy", (featured vocalists Shirley Murdock and Ronnie Diamond). The album sold over two million copies. The album Zapp VI: Back by Popular Demand was released in 2002 by the remaining brothers after the deaths of Roger and Larry. Solo career and production work on other artists In 1981, Troutman cut The Many Facets of Roger, his first solo album. Featuring a funk cover of Marvin Gaye's "I Heard It Through the Grapevine", which went to number 1 on the R&B singles chart, the album sold over a million copies. The album also featured the hit "So Ruff, So Tuff", which was similar to "More Bounce..." as were most Roger/Zapp singles during this time. The same year, Troutman recorded with Parliament-Funkadelic on the band's final Warner Brothers' album The Electric Spanking of War Babies. In 1984, Troutman issued his second solo album The Saga Continues..., which featured the singles "Girl Cut It Out", "It's in the Mix" (which was dedicated to Soul Train and its host Don Cornelius), and a cover of Wilson Pickett's "In the Midnight Hour", which featured gospel group the Mighty Clouds of Joy. In 1987, Troutman scored his most successful solo album with Unlimited!, carried by the hit "I Want to Be Your Man" which rose to number 3 on the Billboard Hot 100 and number 1 on the R&B chart. Alongside his successful career as Zapp member and solo artist, Troutman also became a producer and writer for other artists including Shirley Murdock, whose 1985 Platinum debut featured the Roger-produced hit "As We Lay". He also produced for Zapp member Dale DeGroat on his solo efforts. In 1988, Troutman made an appearance on Scritti Politti's third album Provision, providing talk box vocals on the songs "Boom There She Was" and "Sugar and Spice". Three years later, Troutman released his final solo album with Bridging the Gap, featuring the hit "Everybody (Get Up)". He worked with Elvis Costello on the song "The Other Side of Summer". In 1989, NBA Entertainment selected Troutman among a variety of candidates to record a tribute song