Double whole note Double whole note In music, a double whole note (American), breve (international), or double note (; ) is a note lasting two times as long as a whole note (or "semibreve"). It is the second-longest note value still in use in modern music notation (; ). In medieval mensural notation, the "brevis" was one of the shortest note lengths in use —hence its name, which is the Latin etymon of "brief". In "perfect" rhythmic mode, the brevis was a third of a "longa", or in "imperfect" mode, half a "longa" . In modern notation, a breve is commonly represented in
Harmonic table note layout with novel tunings such as the Bohlen–Pierce scale. It is in use for ongoing research into microtonal scales by music researchers and composers, in particular Carlo Serafini, Elaine Walker and Dr. Richard Boulanger. Harmonic table note layout The Harmonic Table note-layout, or tonal array, is a key layout for musical instruments that offers interesting advantages over the traditional keyboard layout. Its symmetrical, hexagonal pattern of interval sequences places the notes of the major and minor triads together. It is sometimes called the "Melodic Table" note-layout, and more rarely the "Triad" note-layout. It is related to the Wicki-Hayden based keyboards and