def bv.go
import emerging-ezaudio@0.4.0.0/src/mp3_enc.bend as Mp3Encimport Base
418def bv.go(hop: Nat, st: Bv, +hz: U32, +band: U32) -> Bv:
419 match hop:
420 case 0n:
421 st
422 case 1n+p:
423 bv.go(p, bv.at(st, hz, band), hz, (band + 1 : U32))