This document provides musical definitions and concepts from various sources, including Elementary Training for Musicians by Hindemith, 114 Songs by Charles Ives, Mikrokosmos Books I and II by Bartok, and Winter Words by Benjamin Britten. It defines a major third as a whole step plus a whole step, describes the whole-tone scale as made of all whole steps, and a minor third as a whole step plus a half step. It also covers octatonic scales, enharmonic notes, diatonic scale patterns, modal music having notes other than C as the tonic, and maintaining scale patterns with key signatures.