Fanned beams show either an accelerando or rallentando by having multiple beam lines either converging on, or diverging from, a single beam line at the other end. Fanned beams are also known as “feathered beams”.
A single fanned beam can have multiple changes of direction within it.
The grouping can use either two or three beams, with three beams indicating a greater change of speed than two beams. The slowest part of the phrase is where the beams converge, and the fastest is where the beams are the most spread out.
Example
Fanned beam accelerando with three lines |
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Fanned beam accelerando with two lines |
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Fanned beam rallentando with three lines |
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Fanned beam rallentando with two lines |