Metadata output result of MASA prerend with muted MASA signal and ISM3 is quite differing
Basic info
Bug description
Using the command line and provided input signals, then plot of metadata below is obtained. This shows quite a bit of difference in metadata. As the MASA input signal is muted, the result should be always the MASA metadata analyzed from the combined ISM signals with exception of situation where also the ISM path is zero.
Looking at the metadata (azimuth, elevation, and dir ratio), my guess would be that there is some loss of accuracy happening and the analysis goes wrong. In addition, having any spread coherence in output is a bit suspicious as analysis from ISM does not produce it. My guess could be that this might be a result of zero energy being in both and silent MASA winning the comparison.
Ways to reproduce
Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1786
All input files are in Box. These files are derived from the normal STV vectors.
IVAS_rend -no_delay_cmp -if meta -i stv48_zero1MASA2TC_3ISM.txt -fs 48 -of MASA2 -o 0013_stv48_zero1MASA2TC_3ISM.wav_MASA2-no_delay_cmp.wav