interpolateIn :: Time -> [ControlPattern] -> ControlPattern
Morph control values between patterns in a given number of cycles. The first argument supplied to `interpolate` is the ID of the new pattern that is created and the second is the number of cycles.
d1 $ sound "arpy*16" # cutoff 100
interpolateIn 1 2 $ sound "arpy*16" # cutoff 16000
Stop the newly created pattern using its id: