The voice is the essential element in singing. It is based upon sound. This is based upon three agents:
The projective agent, or the lungs.
The vibrative agent, or the larnyx.
The reverberative agent, or the mouth.
Each of these agents acts in different ways, nine acts resulting therefrom, which we will call products of phonetic acts.
The projective agent in its special activities engenders
- Intensities,
- Shades,
- Respirations.
The vibrative agent in its special activities engenders
- Prolations,
- Pathetic effects,
- Registers.
The reverberative agent in its special activities engenders