The ranges of Winds, Brass, Percussion, Keyboards, and Strings. More instruments and categories to come.
A list of 20+ common chord progressions including their notation, audio, and tonality: Major, Minor, Atonal, Bitonal, Indeterminate, Phrygian, etc.
Some excerpts from the Vanguard Guitarist which include: extended techniques, bi-tones, and more.
Brief overview and reference on: Just Intonation,Meantone Temperament,Pythagorean Tuning,Well Temperament,Equal Temperment,Basic Accoustics,Harmonic Series,Overtone Series, and more in brief.
The Orchestra: A User's Manual is one element of The Sound Exchange, a pioneering web development by the Philharmonia Orchestra. The aim of the user's manual is to provide information about the orchestra, orchestration, composition and instruments, for the benefit of anybody with an interest in the subject. Unlike conventional text-based orchestration manuals, this features movies of players explaining relevant aspects of their instruments and technique, audio clips and samples of the instruments, and illustrative music from the repertoire drawn from the Philharmonia's postwar recorded archive.