Per listener request: over 30 minutes of 174 Hz and 528 Hz Solfeggio tones and frequencies to help calm the spirit. The 174 Hz commonly is used for relaxation whereas the 528 Hz often is used for sleep and healing. It is highly recommended to listen to these tones in a quiet, dark and peaceful surrounding such as the bedroom. Use in conjunction with the 4-7-8 breathing method to help the listener relax more quickly which in turn will help overcome any sleep issues. Listen whenever insomnia strikes and with headphones on for full effect. Possible ASMR triggers