Horst recorded orchestral arrangements for a number of prominent recording artists including: two songs for Collective Soul's CD Dosage, Street Symphony from Monica, and two songs for R.E.M's Up. Horst completed a musical sore and complete sound design for the 20/20 episode "9 minutes 20 seconds" and the opening theme for Cartoon Network's Cartoon of the Day. Horst worked on an Atlanta Braves promo for TBS and a national campaign, with DFI Creative, for Hammermill Papers, and Ban Deodorant.
Upcoming projects for Horst include music for the third season of "Salsa," GPTV's Spanish language show for television and songs for Cartoon Network's "Space Ghosts: Brak's Extra Special Extraterrestrial Special." Horst will also work on an arrangement for Red Hot and Blue, a CD by Red Hot, the international AIDS charity, and a two minute original orchestral score for a major campaign by the Starz/Encore Network.