def dec.fold
import emerging-ezaudio@0.4.0.0/src/mp3_dec.bend as Mp3Decimport Base
517def dec.fold(xs: List<&2, F32>, +acc: U32) -> U32:
518 match xs:
519 case Nil{}:
520 acc
521 case +hd <> tl:
522 dec.fold(tl, U32.xor(acc, f.word(hd)))