She was humming a little wordless tune.

She began to hum a little wordless tune.

She began to hum, then to sing wordless tunes.

Then she began to hum a wordless, plaintive tune.

Without thought, he pulled melody and harmony from her; a pensive, wordless tune.

Then it grew radiant, as she sang a wordless tune.

But even then, with his head against her heart, his lips, or some pulse or nerve, had moved in a wordless tune, the beat of time.

He waited for her, listening to the wordless tune grow more frantic, hearing her breathing turn ragged, feeling her tension increase.

Egwene recognized a nameless, wordless tune her mother used to hum to, her when she was little.

Horner had tried 25 or 30 singers and, in the end, he chose Sissel to sing the wordless tune.