Sonus Rex, Music Education: NYC Guitar Studio 
Programmatically, a multi-genre, cross-cultural, progressive creative music studio operation, with a pronounced learner-centered philosophy, building on Sten Hostfalt's long-time (since 1992) studies and in-performance active exploration of the parameter of pitch, as documented on recordings and in concerts over the past twenty years, Sten Hostfalt's NYC Guitar Studio is one of few facilities anywhere offering systematic explorative microtonal music studies for the standard 12-fret, 6-string guitar, as well as other musical instruments. 

As the educational division of Sonus Rex, initially DBA Brooklyn Guitar Studio, and when relocated to Manhattan, as NYC Guitar Studio, and currently simply Sten's Guitar Studio. The sessions, hosted by Michiko Studios, as well as Rivington Music, and Funkadelic Studios, has for the past eighteen years catered to students of all ages and levels of proficiency, through instruction in classical, and electric guitar, electric bass, mandolin, ukulele, piano, composition, and music theory as well as digital audio recording and production techniques.

Upon request, coaching have included preparation for audition, application and successful admission to music programs and institutions at Berklee College of Music, SUNY Purchase-The State University of New York, University of Michigan School of Theatre and Dance, Bard College, Eastman School of Music, Manhattan School of Music, The New School for Social Research, New York, The Special Music School at Kaufman Center NYC, Bard College, Western Illinois University and The Jazz Academy at Jazz at Lincoln Center NYC. In addition, musical instruction have also been provided to students enrolled at Juilliard School of Music, Columbia University, Rockefeller University, New York University, The Royal College of Music in Stockholm, Fiorello LaGuardia High School for The Performing Arts, City University of New York, Mannes School of Music, Brown University, The New World School for The Arts, Miami-Dade College, FL, and Berklee College of Music. Also catering to music industry professionals, music instruction services have been provided to recording/touring artists signed to RCA, Rough Trade, SONY, ECM, Sub Pop, and Nonesuch Records, and to music industry professionals employed by Eventide, Columbia and Epic.

As an educator, Sten Hostfalt holds a Masters Degree in Music Education from Columbia University's Teachers College, and an Advanced Certificate (K-12) in Music Education, from the City University of New York at Brooklyn College. A Masters Degree in Composition, and a Graduate Diploma in Performance from New England Conservatory. Along with a Bachelors Degree in Professional Music from Berklee College of Music. And a Digital Music Production certificate from the Royal College of Music, Stockholm. Initially self-taught, his formal training has since included classical guitar studies with Björn Werngren, Bengt Edqvist (Hoffner), Henry Nilzon, and Richard Jakobowski. Jazz Guitar with Bengt Holmqvist, Jon Damian and Mick Goodrick. Piano with Victor Lin. Composition/Music Theory with Malcolm Peyton, James Hoffmann, Pozzi Escot, Jimmy Giuffre, Joe Maneri, and George Russell, orchestration with Lee Hyla. In addition to composition masterclasses with Toru Takemitsu and Györgi Ligeti, and intro to Oud/Arabic Music with Brian Prunka, and Indian music with Peter Row. 

Currently an adjunct guitar instructor at Columbia University's Teachers College, and a band teacher for the New York City Department of Education. Mr. Hostfalt has previously served as an electronic/digital music and piano instructor at Teachers College, and taught guitar at the The Royal College of Music in Stockholm, and at Queensborough Community College, City University of New York*. As well as, as a lecturer at New World School for the Arts, Miami, FL, Berklee College of Music, and in workshops at Colegio Ward and Centro Cultural San Martin, Buenos Aires Argentina, as a member of Guillermo Klein's large ensemble. Additional education work include as a music teacher at First Flight Music School, East Village New York, as an assistant guitar instructor at Skurup's Folk High School, Sweden. And as a faculty member of New York Jazz Academy (since 2009), including performances at Carnegie Hall's Stern Auditorium, New York City. *DISCLAIMER: Neither Sten Hostfalt, nor his DBA's Sonus Rex and Sten's NYC Guitar Studio are affiliated with Queensborough Community College, or The City University of New York CUNY.

As a theorist and researcher in music and music education, Sten Hostfalt's research interests include exploration of the parameter of pitch, expansion of the standard resource, practice and repertoire in improvised music, interdisciplinary and inter-generational collaborative creative interchange, and issues of systemic marginalization in academia. Mr. Hostfalt is a member of UFT, NAfME, NYSSMA, MEANYC, the Society for Research in Music Education, OAKE (KONY), AOSA, AFM-Local 802, The Society for Music Theory, Guitar Foundation of America, the Audio Engineering Society, Jazz Foundation of America, and BMI.