Metadata output result of MASA prerend with muted MASA signal and MC 5.1 has high dir ratio values in BASOP

Basic info

• Float (renderer): db364042
• BASOP (renderer): 713f2d39

Bug description

Using the command line and provided input signals, then plot of metadata below is obtained. This shows some difference in metadata. As the MASA input signal is muted, the result should be always the MASA metadata analyzed from the MC signal with exception of situation where also the MC path is zero.

Looking at the plot, it is quite evident that the BASOP version has section where the dir ratio value is at unity. This looks a bit suspicious to me.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1788

Inputs are in Box.

IVAS_rend -no_delay_cmp -if meta -i stv48_zero1MASA2TC_MC5_1.txt -fs 48 -of MASA2 -o 0018_stv48_zero1MASA2TC_MC5_1.wav_MASA2-no_delay_cmp.wav