High Quality Content by WIKIPEDIA articles! The perfect fourth ( About this sound Play (help·info)) is a musical interval which spans four scale degrees. It consists of the note and the note five semitones above it on the musical scale. For example, the interval between a C and the next F above it is a perfect fourth; similarly the interval between a G and the next C above it, between an F and the B flat above it, and so on. The perfect fourth may be derived from the harmonic series as the interval between the third and fourth harmonics.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.