Musical note standardised at 440 Hz, lying in the octave containing notes from C (middle C) to B. The lowest note on most pianos is A, the highest C. The MIDI system for electronic musical instruments and computers uses a straight count starting with note 0 for C at 8.1758 Hz up to note 127 for G at 12,544 Hz. A written note can also have a note value, a code that determines the note's relative duration. In order of halving duration, they are: double note (breve); whole note (semibreve); half note (minim); quarter note (crotchet); eighth note (quaver); sixteenth note (semiquaver).;
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