High MLD for ParamMC 5.1 at 48/64/80kbps or 7.1+4 at 128kbps

Basic info

• Encoder (float): d9fdb374
• Decoder: d18cbee3

Bug description

A selection test vector coded with MC at 48kbps has low frequency portions missing compared to the float reference. See for example channel 3.

This results in a high MLD of 9.79.

Float reference output

Fixed point output

Difference signal

Ways to reproduce

./IVAS_cod_flt_ref -mc 5_1 -max_band FB 48000 48 experiments/basop-verification/MC-5_1/proc_input/am2aa1s10.wav out/mc-5_1--am2aa1s10--48000.192
./IVAS_dec_fx 5_1 48 out/mc-5_1--am2aa1s10--48000.192 out/mc-5_1--am2aa1s10--48000.clean.dec.fx.wav
./IVAS_dec_flt_ref 5_1 48 out/mc-5_1--am2aa1s10--48000.192 out/mc-5_1--am2aa1s10--48000.clean.dec.flt.wav

Bitstream has been uploaded.