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A curfew has been imposed and the state has issued "shoot at sight" orders to bring the situation under control.

"There's a massive demand," says Colin Hilditch, who is head of community services at Sight Scotland.

Transposing at sight means being able to read a part written in one key while playing it in another key.

A very accomplished player of one of these instruments may be able to transpose at sight, saving you the trouble of writing out a transposed part, but most players of these instruments will need a transposed part written out for them.

Because of this, some horn players learn to transpose at sight.