def ch.prep
import emerging-ezaudio@0.4.0.0/src/mp3_syn.bend as Mp3Synimport Base
1537# antialias, IMDCT, and the sign flip for one channel
1538def ch.prep(
1539 acc: Array<F32>, +ov: List<&2, F32>, +aa: List<&2, F32>, +tw: List<&2, F32>, +win: List<&2, F32>,
1540 +base: U32
1541) -> Im:
1542 im.sign(im.go(32n, Im{aa.run(acc, aa, base), ov}, tw, win, 0, base), base)