D is the musical note that vibrates the Svadhisthana (Sacral Chakra). This is where the creative energy emanates from.
The MANTRA for this chakra is Adi Shakti.
The mantra is represented by the Adi Shakt symbol. This symbol invokes the primary Creative Power which is manifest as the feminine. The Adi Shakti symbol which dates back about 10,000 years. This is the Sikh interpretation of it.
TRANSLATION: I bow to the primal power, I bow to the all encompassing power and energy., I bow to that through which God creates, I bow to the creative power of the Kundalini, the Divine Mother Power.
MEANING: The Adi Shakti Mantra tunes one into the frequency of the Divine Mother, and to the primal protective, generating energy. It is said that chanting it eliminates fears and fulfills desires.