And it came to pass, when the evil spirit from God was upon Saul, that David took an harp, and played with his hand: so Saul was refreshed, and was well, and the evil spirit departed from him. (KJV)
But now bring me a minstrel. And it came to pass, when the minstrel played, that the hand of the Lord came upon him. (KJV)
There are some Christians who resist the focus on solfeggio tones in worship because the use of those tones is very prevalent in New Age and other religions. However, it is important to understand that these frequencies are intricately woven into the fabric of creation. YHWH is the Creator. He created the frequencies and the benefits of the frequencies, as well as the inherent harmony found in nature.
This is what King David tapped into during his psalms and musical expressions. The enemy can only counterfeit what God created. In doing so, he distorts the original purpose and intent of these powerful tones. By embracing the true frequencies set forth by the Creator, worshipers can connect more deeply with the Holy Spirit and experience a profound transformation in their worship practices.