 One of his best received works has been Fantasie No.1 for flute and cello.He has also recorded "Secundum Scripturas" with the mixed Vienna Chamber Choir.To celebrate his 50th birthday, in September 2012, Wagner put on a special concert at the ACF London with Holger Busch, Jörg Wachsenegger and Gerhard Waiz (TRIS), playing trios Mozart's "Kegelstatttrio", Gestural Variations by Graham Waterhouse, Mark Anthony Turnage's "Cortège for Chrisand", and a new work by Wagner.