octatónico

Octatónico is a term used in music theory to describe an eight-note scale. This is in contrast to more common scales like the diatonic scale (seven notes) or pentatonic scale (five notes). An octatonic scale contains eight pitches, and typically these pitches are arranged in a pattern of alternating whole and half steps, or vice versa. This alternating pattern creates a symmetrical and often ambiguous sound.

There are two primary forms of the octatonic scale, depending on the starting interval. The first, often referred to as octatonic scale 1, begins with a whole step followed by a half step (W-H-W-H-W-H-W-H). The second, octatonic scale 2, begins with a half step followed by a whole step (H-W-H-W-H-W-H-W). Both of these scales are symmetrical and contain only three distinct pitch classes.

Octatonic scales are known for their chromatic and sometimes dissonant quality. They are often employed in 20th and 21st-century music, particularly in the works of composers like Igor Stravinsky and Olivier Messiaen, who explored their unique harmonic and melodic possibilities. Their symmetrical nature allows for smooth voice leading and interesting intervallic relationships, contributing to a rich and complex musical texture. The diminished seventh chord is a prominent sonority within the octatonic scale, further enhancing its characteristic sound.