Just came across this useful resource. It’s basically an online orchestration textbook. I haven’t explored it in depth yet, but it has a really cool feature you couldn’t get in an ordinary textbook: video demonstrations. Just pick an instrument, and you’ll see clips with members of the Philharmonia Orchestra (UK) talking about, and demonstrating their particular instrument. This is all part of the Philharmonia’s parent website, the Sound Exchange. If you’re a composer, check it out.
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