audio_apply_stage
audio_apply_stage(track, &track->codec, false);
audio_apply_stage(track, &track->chvol, false);
audio_apply_stage(track, &track->chmix, false);
audio_apply_stage(track, &track->freq, true);
audio_apply_stage(track, &track->freq, true);
audio_apply_stage(track, &track->chmix, false);
audio_apply_stage(track, &track->chvol, false);
audio_apply_stage(track, &track->codec, false);