7-limit

Harmonic seventh  Play , septimal seventh.

Septimal chromatic semitone on C  Play .

7-limit or septimal tunings and intervals are musical instrument tunings that have a limit of seven: the largest number contained in the interval ratios between pitches is a multiple of seven.

For example, the harmonic seventh has the ratio 7:4 and is thus a septimal interval while the greater just minor seventh, 9:5  Play , is not. Similarly, the septimal chromatic semitone, 21:20, is a septimal interval as 21÷7=3.

See also

• Đàn bầu
• Tonality diamond#7-limit