[4][5] Slapin has written more than sixty viola-centric chamber works[6][7] and was commissioned to write the required piece for the 2008 Primrose International Viola Competition.
[3] He served on the committee for the first Maurice Gardner Composition Competition and co-premiered the winning work, Rachel Matthews' Dreams, at the 38th International Viola Congress.
Slapin has written extensively for the Penn State Viola Ensemble and the Wistaria String Quartet, and he is a former fellow at the Montalvo Arts Center in California.
[11] They won 'Best Chamber Performance of 2008' at the Tribute to the Classical Arts in New Orleans,[12] and they have premiered and recorded duos by Gerald Busby, Robert Cobert, Richard Lane, Rachel Matthews, Patrick Neher, Frank Proto and David Rimelis, among others.
Slapin graduated at the age of eighteen from the Manhattan School of Music,[19] where he studied with Emanuel Vardi.,[3] In memory of Vardi, he wrote 'Capricious', a viola trio which references several of Paganini's Caprices.