In 2004 he performed Books II & III of Preludes and Fugues for 2 pianos with pianist/composer Frederic Rzewski.
In 2012, Hus created an opera based on Chris Ware's Lint (Acme Novelty Library #20).Since 2004, Walter Hus is artist in residence at Namahn.
Walter Hus' recording studio, featuring a Decap organ, is located in the Namahn spaces.In recent years, Hus is best known for his work with the Decap organ.
He started transcribing sheet music for Decap's new instruments in the early 2000s and "fell completely in love with the whole instrumentarium and saw far greater potential in it".
Decap lent him an instrument, and Hus continues composing for and performing with the organ.In 2010, Hus composed a Decap version of Universal Nation for the documentary The Sound of Belgium.In 2015 he received the Ensor Award at the Oostende International Film Festival for his soundtrack to the film N-the madness of reason by Peter KrĂĽger.