Creates a cyclic amplitude stream that moves from the minimum value from amplitude to the maximum value to amplitude in in number of beat type of beats. from, to and in must be specified but may occur in any order.

Example:

? (setf x (crescendo from p to fff in 12))
#<CYCLIC-ITEM-STREAM 131666241>

? (read-items x)
(0.4 0.44545457 0.4909091 0.53636366 0.58181816 0.6272727
 0.6727273 0.7181818 0.76363635 0.80909085 0.8545454 0.9)

See Also: