Music with sound harmony tuned at the frequency A4=432Hz.
When compared to music tuned at the standard A4=440Hz, experts say that "the sound harmony of music tuned at A4=432Hz feels more cored in the low-end, warmer in the mid-range, and more transparent and spacious in the high-range". 432Hz music really sounds better.
This natural tuning was used by many famous classic composers.