"Diatonic" refers to a musical scale that consists of seven distinct pitches, which are the foundation of Western music. This scale includes five whole steps and two half steps, creating a pattern that can be found in major and minor scales. The term is often used to describe melodies and harmonies that stay within these seven notes, avoiding any chromatic alterations. In a diatonic scale, the notes are organized in a way that creates a sense of tonal center or key. For example, in the C major scale, the notes are C, D, E, F, G, A, and B. This structure allows for the creation of chords and progressions that sound harmonious and cohesive, making diatonic music a fundamental aspect of composition and performance.