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Have MP3s killed the art of whistling?

10 March 2011 Last updated at 09:07 GMT

What is a more common sound - the chirp of someone whistling or the muffled beat of someone's music from their earphones?

World Champion whistler David Morris thinks his skill is a dying art and blames the personal music player.

Is he right?

Sophie Van Brugen reports.

Pictures: British Pathe