Diatonikk

Diatonikk is a term used in some languages to denote the diatonic concept in Western music theory. It designates the organization of pitch classes into the diatonic scale, a seven-note subset of the chromatic scale that forms the basis of most tonal music. The diatonic system underpins the major and natural minor scales, which share the same key signatures and differ in their interval patterns.

The diatonic scale is defined by a pattern of whole steps and half steps. The major scale follows a W–W–H–W–W–W–H rhythm, while the natural minor follows a different arrangement of steps. Diatonic harmony builds triads on each scale degree, producing functions such as tonic, subdominant, and dominant. Common progressions, like I–IV–V–I, rely on the diatonic framework. The diatonic concept also encompasses the seven modes developed from the ancient scale system: Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian.

Tuning and instruments: Diatonic systems can be realized in equal temperament or other tunings. Many traditional instruments are inherently diatonic, meaning they readily produce pitches within a single key or a small set of keys. Examples include the diatonic harmonica and the diatonic accordion, as well as keyboards or button layouts designed to emphasize the diatonic pitches of a key.

History and usage: The diatonic concept emerged in ancient and medieval theory and was formalized during the Renaissance, becoming central to Baroque and classical tonal music. In modern practice, the diatonic framework underlies most Western music education, ear training, and many folk traditions, even as chromatic and atonal approaches have broadened musical language.

Etymology: The term derives from Greek diatonos, meaning “through tones,” and entered various languages with the sense of diatonic.