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Composing and Improvising

AF115003S

Instrumentation


Part-writing and Transposition

Part-writing

Part-writing is an extremely skilled occupation. It requires a lot of time and patience. If you do not allow this time and patience the likelihood is that your parts will be faulty, illegible, impractical or both and will cause you significant difficulties and embarrassments during a rehearsal.

Transposition

There's a very basic rule here. When an instrument in a certain key plays a C, the pitch that comes out will be the pitch of their transposition. The only thing that will vary will be the octave transposition. So, for example, when a trumpet in B flat plays a C, the tone that comes out will be a B flat. In this case, it's the B flat below it. If a French Horn (in F) plays a C, the tone that comes out will be pitched F, (in this case, the F one fifth below the notated note.