High energy differences for MC 5.1 for 3 first frames

There are large differences between float and BASOP for the first 3 frames of the items for operating mode MC 5.1. These is observed in several items, two most prominent examples (with binaural output):

bm2aa1s04_MC_5_1_b96_fb_cbr.dec.BINAURAL.wav (MLD: 1.6658202)

am2aa1s08_MC_5_1_b128_fb_cbr.dec.BINAURAL.wav (MLD: 0.9090823)

It should be noted that this happens already in pass-through mode, but becomes more prominent with binaural output.

SHA: 71d2f480 bitstreams: bm2aa1s04_MC_5_1_b96_fb_cbr.192 and am2aa1s08_MC_5_1_b128.192 will be uploaded in respective issues folder.