LEVEL_MINUS_3DB    84 libavcodec/ac3dec.c     LEVEL_MINUS_3DB,
LEVEL_MINUS_3DB   342 libavcodec/ac3dec.c         s->downmix_coeffs[nf][0] = s->downmix_coeffs[nf][1] = smix * LEVEL_MINUS_3DB;
LEVEL_MINUS_3DB   364 libavcodec/ac3dec.c             s->downmix_coeffs[i][0] = (s->downmix_coeffs[i][0] + s->downmix_coeffs[i][1]) * LEVEL_MINUS_3DB;
LEVEL_MINUS_3DB   639 libavcodec/ac3dec.c         add_bias *= LEVEL_MINUS_3DB; // compensate for the gain in downmix