Institutio Oratoria

It is not necessary for my purpose to enquire into the causes which give rise to these peculiarities. I need not raise the question whether the difference lies in those organs by which the breath is produced, or in those which form the channels for the voice itself; whether the voice has a character of its own or depends on the motions which produce it; whether it be the strength of the lungs, chest or the vocal organs themselves that affords it most assistance, since the co-operation of all these organs is required. For example, it is not the mouth only that produces sweetness of tone; it requires the assistance of the nostrils as well, which carry off what I may describe as the overflow of the voice. The important fact is that the tone must be agreeable and not harsh.

The methods of using the