528 Hz sits at the heart of the ancient Solfeggio scale — a set of tones derived from a medieval hymn to John the Baptist and rediscovered in the 1970s by Dr Joseph Puleo. Of the six original frequencies, 528 Hz has attracted the most attention and the most research. It corresponds to the note C5 in scientific pitch, and is sometimes called "Mi" from the Latin phrase "Mi-ra gestorum" — miracles.

Proponents associate 528 Hz with transformation and repair at a cellular level, citing studies suggesting that sound at this frequency may influence water crystallisation and reduce stress hormones. The frequency is a favourite among sound therapists, meditation practitioners, and ambient composers who use it as a drone or tuning reference.

Whether you approach it through science, spirituality, or simple curiosity, 528 Hz is a compelling frequency to sit with. Use the player above to experience it directly — start with the pure tone, then blend in the ambient pad layer for a warmer, more immersive listen.