New answers tagged orchestra
Daniel is correct, but I believe the "epic" effect you're referring to (as produced by a choir) is the chorus effect. From Wikipedia: In music, a chorus effect (sometimes chorusing or chorused effect) occurs when individual sounds with approximately the same timbre, and very similar pitch converge and are perceived as one. While similar sounds coming ...
Its called a choir, which is an ensemble of human voices. So I don't have to write a long-winded answer on how a choir works, you can find out more here: https://en.wikipedia.org/wiki/Choir (General choir stuff) http://www.totalchoirresources.com/lets-talk-choir-formations/ (Choir formations)
To add to Neil's comment, given that when the clarinet player plays a C, it sounds like a B-flat, then to compensate, you must tell the clarinet player to play a D so that it sounds like a C - and thus matches the C played by the rest of the orchestra. If you're writing a piece and are looking to arrange it for band or orchestra, I highly recommend tracking ...
This is more of a comment really but I don't have the rep to post it as such. Whilst I mostly agree with what Tim has said it occurs to me that there is no reason for this to be always true. There are piano pieces where the left hand part and right hand part have different key signatures (e.g. Prokofiev's Sarcasms 3rd mvt), so I would not be surprised if ...
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