lfo_advance       257 libavfilter/af_acrusher.c             lfo_advance(&s->lfo, 1);
lfo_advance       173 libavfilter/af_apulsator.c         lfo_advance(&s->lfoL, 1);
lfo_advance       174 libavfilter/af_apulsator.c         lfo_advance(&s->lfoR, 1);