Solfeggio frequency 639Hz note pure sine tone royalty free sound (1 hour) for healing or meditation video, relaxation vlog, alternative sound therapy, and commercial business use. The 639 Hz frequency, also know as the “Connecting Frequency” aims to promote harmonious relationships, increase communication, as well as emotional healing and balance. Download high quality 1 hour … Continue reading Solfeggio Frequency 639 Hz (1 Hour)