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The Classic FM Concert with John Suchet 8pm - 10pm
23 March 2016, 11:25 | Updated: 6 January 2017, 14:45
Expert horn player Sarah Willis was game enough to have her mouth scanned while she pumped out some horn exercises that utilised different areas of her mouth.
As you might expect, the things you cannot see normally are the most interesting. Just look how the mouth shape changes as the techniques do, from slurring to staccato.
Bung a horn player in an MRI scanner, and this is what you get: