Hela wrote: |
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4) My best friend’s son has become a first violin in the orchestra of the Royal Opera House.
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I think "in" here has the sense of "as a component of". We play "in" an orchestra because we're a part of it; cf. "he plays in a local football team". And perhaps there's also a residual sense of "in the orchestral pit".
If the writer had chosen "with the orchestra", on the other hand, it would have sounded a little detached.
MrP