This workshop builds instruments you can play with one hand. Discover the world of adaptive instruments on Music Matters, Saturday 2nd December, 11.45am. Video: A man called Peter stands in his workshop, holding a one-handed whistle he made. He's an older man with glasses, wearing a long, dark blue apron and fleece. To the left is a long workbench covered in tools and small instrument parts. In the workshop are a couple of large, industrial looking machines which have obviously had a lot of use.