The Art Music community. This includes students, hobbyists, amateurs, professional, and general admirers of classical music. The site is all about promoting and making classical music more accessible to the general public.
These people will most likely play instruments like, but not limited to: Piano, Violin, Cello, Clarinet, Oboe, Trumpet, Trombone, Tuba, Flute, etc. Or perhaps better put, Winds, Strings, Brass, and Orchestral Percussion.