talk low

He writes about meeting Wayne, who gave him this advice on making it in Hollywood: "Remember to talk low, talk slow and don't say too much."

From Reuters ● Oct. 27, 2010

So thou shalt go through the garden gate and hear again the whispering of the souls when they talk low where sing the voices of the gods.

From Time and the Gods by Edward John Moreton Drax Plunkett, Baron Dunsany

For however this extraordinary interview might end, it must pass if possible without waking Catriona; and the one thing needful was that we should sit close and talk low.

From David Balfour, Second Part Being Memoirs Of His Adventures At Home And Abroad, The Second Part: In Which Are Set Forth His Misfortunes Anent The Appin Murder; His Troubles With Lord Advocate Grant; Captivity On The Bass Rock; Journey Into Holland And France; And Singular Relations With James More Drummond Or Macgregor, A Son Of The Notorious Rob Roy, And His Daughter Catriona by Robert Louis Stevenson

"No—don't care—talk sweet—talk love—so no one hear but gal—gal talk low, sweet, so no one but him hear," returned the Indian, pleasantly.

From Oonomoo the Huron by Edward Sylvester Ellis

A moment they stared; then they began to talk, low, excitedly.

From Frank of Freedom Hill by Samuel A. (Samuel Arthur) Derieux