def step.err.keep
import emerging-ezaudio@0.4.0.0/src/wav.bend as Wavimport Base
315def step.err.keep(+_phase: U32, st: St, +hd: U32) -> St:
316 match st:
317 case St{phase, +left, tag, sz, _sn, kind, ch, rate, acc, frames}:
318 step.err.dec(U32.is_eq(left, 1), phase, left, tag, sz, kind, ch, rate, hd <> acc, frames)