the solfeggio frequencies

The individual Solfeggio Frequencies are 174 Hz, 285 Hz, 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, and 963 Hz. The Solfeggio Scale tones are associated with UT (396 Hz), RE (417 Hz), MI (528 Hz), FA (639 Hz), SOL (741 Hz), and LA (852 Hz).
Much has been attributed to the healing powers associated with the Solfeggio Frequencies (Original Solfeggio Scale). I don’t know. I’m merely presenting these MP3 files as reference implementations.
Each MP3 file is 20 minutes long and mono. They begin and end with a 30 second fade in and fade out. You can listen to them with or without headphones (they aren't binaural beats). Use them as an ambient background sound or as a meditation aid

Solfeggio Frequency 174 Hz