Why do I feel the urge to join my voice to theirs?

Chett had no choice but to join his voice to the others.

Oh, incidentally, I'll join my voice with those of the others in nominating you.

The coachman understood first and joined my voice with his, shouting words I'd never heard before.

Who will join his voice with mine in this nomination?

If you join your voice to hers, perhaps we could all go to the Ludlucks and make them see reason.

And Equebus also joined his voice in the asking.

Connie immediately complained, and Sol joined his voice to hers.

Now the band struck up another tune, and she joined her voice with Walter's in a duet.

In between, the singers took turns soloing and occasionally joined voices.