The 963 Hz frequency is sometimes referred to as the "SI" frequency within the Solfeggio scale, although the Solfeggio scale typically consists of only six frequencies, and 963 Hz is not part of the traditional Solfeggio scale. This frequency is often associated with spiritual awakening, ascension, and the activation of the pineal gland, which is believed to have a role in consciousness and spiritual development.
As with other Solfeggio frequencies, it's important to note that the healing and spiritual properties attributed to them are not scientifically proven. The Solfeggio frequencies have gained popularity in New Age and alternative medicine circles, and people use them in meditation, sound therapy, and other holistic practices. While some individuals may find value in using these frequencies for their intended effects, there is limited scientific evidence to support such claims. Therefore, it's advisable to approach them with an open but critical perspective.