def col.b
import emerging-ezaudio@0.4.0.0/src/mp3_enc.bend as Mp3Encimport Base
894def col.b(
895 hop: Nat, xs: List<&2, List<&2, F32>>, +band: U32, acc: List<&2, F32>
896) -> List<&2, F32>:
897 match hop xs:
898 case 0n _:
899 f.rev(acc)
900 case _ Nil{}:
901 f.rev(acc)
902 case 1n+p +blk <> tl:
903 col.b(p, tl, band, f.nth(blk, band) <> acc)