The song sparrow modulates its simple ditty as softly as the lining of its own nest.
"Birds and Poets"
John Burroughs
The young comtesse was, they say, of slender frame and angelic beauty, and deeply imbued with that religious ardour which, as in Liszt's case, often modulates as imperceptibly into love, as an organist can gradually turn a hymn into a jig, or an Italian aria into a hymn.
"The Love Affairs of Great Musicians, Volume 2"
Rupert Hughes
The highest literature is that which suggests life itself, and a living man has a beaming eye, a smiling face, a moving body, and a voice that modulates with every change in idea and feeling.
"Browning and the Dramatic Monologue"
S. S. Curry