Beniamino Gigli, tenor
Gigli gives a tip when talking about vocal technique.

Translation:
- "Therefore, I'll do a breath, a breath without diaphragm. I'll tell you that I'll do that over the breath:
- M'ama, sì m'ama lo vedo... lo vedo
(highlight of the aria Una Furtiva Lagrima, from L'Elisir D'Amore - Donizetti).
It's not necessary the diaphragm. Why? I'll say: this 'canto' is supported only over the breath, over the 'fiato', but when:
- quando io mi debbo impegna-a-a-re...
now is necessary, when is need to pledge, is necessary to find the diaphragm."

Sorry for my imperfect italian translation, that's not my natural language. (less info)