7-limit tuning
MUSICAL INSTRUMENT TUNING THAT HAS A LIMIT OF SEVEN: THE LARGEST PRIME FACTOR CONTAINED IN THE INTERVAL RATIOS BETWEEN PITCHES IS SEVEN
Seven-limit; Septimal tuning; 7-limit; 7-limit interval; Seven limit
7-limit or septimal tunings and intervals are musical instrument tunings that have a limit of seven: the largest prime factor contained in the interval ratios between pitches is seven. Thus, for example, 50:49 is a 7-limit interval, but 14:11 is not.