GCHQ decoded, a silent orchestra and collage's cutting edge – the week in art

Edinburgh makes a splash with an art work to swim in as Leonardo reaches across the centuries to a German sculptor – all in your weekly dispatchSamson Young
This Hong Kong artist meditates on the nature of music in thoughtful and entertaining installations, including a film of a silent orchestra. He’s out of his Cage.
• Talbot Rice Gallery, Edinburgh, until 5 October. Continue reading...