The fourth note of the whole tone scale is fa.

She wore a two-tone dress to the party.

The keynote of the song sets the tone for the entire performance.

She spoke to her boss in a deferential tone.

His tone became more and more fervent.

At the tone , please state your name and purpose for the call.

I picked up the phone and heard the dial tone.

The minatory tone of his voice made everyone uneasy.

The basset horn is a woodwind instrument similar in tone to the clarinet.

She spoke in an imperious tone, demanding everyone's attention.