Independent Music Education Business initially founded by Sten Hostfalt in 2006 and officially a division and part of Brooklyn NY registered Music Production Business Sonus Rex ( Sten Hostfalt sole proprietorship ) in 2006. Acting as an independent contractor at NYC, US and International schools and educational operations including New York City Department of Education. Private instruction offered at Midtown and Lower East Side Manhattan studio locations as well as in Ridgewood Queens New York.