In the late 1990s, the tone and emphasis of the show began to change.

More important, the tone of the discussions had begun to change.

With this simple suggestion, the entire texture and tone of the magazine began to change.

Off in the distance a wailing tone began to rise and fall.

A yellow light flashed on the control board, and a tone began to hum.

Then the ringing tone began and someone picked up almost at once.

Even before the recent financial crisis, the tone of such discourse was beginning to change.

In practiced, professional tones, the man began to tell a story.

Her tone was beginning to harden; after all, big eyes don't work on a brother, or shouldn't.

The tone actually began to change before last night's game.