Bigger differences for McMASA Decoding

Basic info

• Float reference:
  • Encoder (float): n/a
  • Decoder (float): n/a
• Fixed point:
  • Encoder (fixed): 3a185145
  • Decoder (fixed): d11823c9

Bug description

Decoding the attached bitstream, we are seeing bigger differences for McMASA 7.1.4 decoding at 64 and 96 kbps compared to other modes:

Mode	max. abs. diff
MC714_48kbps	332
MC714_64kbps	1515
MC714_96kbps	1506
MC714_160kbps	182

The biggest diffs seem to be mostly in the center channel.

Ways to reproduce

IVAS_dec 7_1_4 48 ltv48_HOA3_MC714_64kbps.192 out.wav

Bitstream 64 kbps: ltv48_HOA3_MC714_64kbps.zip

Bitstream 96 kbps: ltv48_HOA3_MC714_96kbps.zip