那兩個較低的「延伸」Solfeggio 音，174 與 285 Hz，靜靜安放在經典六音之下。 隨著 Solfeggio 音組流傳開來，人們在原本六音的下方再置入兩個音，使整段序列圓滿為更完整的九音音階。它們承載著與其餘各音相同的數字印記，並在同一傳統中被描述為紮根、奠基的音高，而非脈輪階梯上的中心。 Independent of any tradition, controlled clinical evidence that a specific frequency produces a specific health effect is limited and mixed. Auriviel presents these tunings as music and contemplative practice. This page is for general information and relaxation. Auriviel's frequency music is not medical advice, diagnosis, or treatment, and no health outcome is claimed. If you have a medical concern, please consult a qualified professional.