The 8 fork Harmony set is based on Pythagorean Tuning, rather than the traditional Tempered Tuning.
The Chakra tuning forks generate the 7 planetary audio frequencies of the 7 Chakras. They are also available as an 8 fork set with the Soul Star, and a 9 fork set that includes the Earth Star.
Set of 9 Solfeggio Tuning forks - Unweighted.
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