In this audio, a female voice is humming the musical notes C, D, and A, as requested. The soothing and melodious hums resonate in the air, creating a serene atmosphere. Each note, distinct and clear, is hummed with precision and control, highlighting the vocal prowess of the woman. The sequence of the notes C, D, and A is repeated, fulfilling the listener's request. The woman's humming is not only pleasing to the ears but also serves as a vocal demonstration of these specific notes. The audio ends leaving a lingering echo of the final hummed note.