def dc.fly
import emerging-ezaudio@0.4.0.0/src/mp3_syn.bend as Mp3Synimport Base
639# butterfly all four rows
640def dc.fly(hop: Nat, xs: Array<F32>, +base: U32) -> Array<F32>:
641 match hop:
642 case 0n:
643 xs
644 case 1n+p:
645 dc.fly(p, but.row(xs, base), u.add(base, 8))