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Second channel of BASOP decoder MASA format output to FOA has missing energy or wrong signal

Basic info

Bug description

The second channel of FOA output from MASA 2TC processing of a noisy selection test item has somewhat weird second channel signal from BASOP decoder. This does not seem to depend too much on bitrate but most clear effects are obtained at higher bitrates where it would be expected that the diff is smaller.

Here are example spectrograms for different bitrates

24.4 kbps

24400_3052

48 kbps

48000_3014

128 kbps

128000_3047_b

512 kbps

512000_3054

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1525

Input file is in the box.

24.4 kbps

IVAS_cod -no_delay_cmp -masa 2 BASOP_Selection_MUSHRA-7ab_s10.met -max_band swb  24400 48 BASOP_Selection_MUSHRA-7ab_s10.wav test_3052.bs
eid-xor -fer -vbr -bs g192 -ep g192 test_3052.bs ep_10pct.g192 test_3052.bs_eid
IVAS_dec -no_delay_cmp FOA 16 test_3052.bs_eid 3052_BASOP_Selection_MUSHRA-7ab_s10.wav_24k4_48-16___FOA-no_delay_cmp.wav

48 kbps

IVAS_cod -no_delay_cmp -masa 2 BS1534-7ab_MASA/BASOP_Selection_MUSHRA-7ab_s10.met -max_band fb  48000 48 BS1534-7ab_MASA/BASOP_Selection_MUSHRA-7ab_s10.wav test_3014.bs
IVAS_dec -no_delay_cmp FOA 32 test_3014.bs 3014_BASOP_Selection_MUSHRA-7ab_s10.wav_48k_48-32___FOA-no_delay_cmp.wav

128 kbps

IVAS_cod -no_delay_cmp -masa 2 BS1534-7ab_MASA/BASOP_Selection_MUSHRA-7ab_s10.met -max_band swb  128000 48 BS1534-7ab_MASA/BASOP_Selection_MUSHRA-7ab_s10.wav test_3047.bs
IVAS_dec -no_delay_cmp FOA 32 test_3047.bs 3047_BASOP_Selection_MUSHRA-7ab_s10.wav_128k_48-32___FOA-no_delay_cmp.wav

512 kbps

IVAS_cod -no_delay_cmp -masa 2 BS1534-7ab_MASA/BASOP_Selection_MUSHRA-7ab_s10.met -max_band swb  512000 48 BS1534-7ab_MASA/BASOP_Selection_MUSHRA-7ab_s10.wav test_3054.bs
eid-xor -fer -vbr -bs g192 -ep g192 test_3054.bs ep_10pct.g192 test_3054.bs_eid
IVAS_dec -no_delay_cmp FOA 48 test_3054.bs_eid 3054_BASOP_Selection_MUSHRA-7ab_s10.wav_512k_48-48___FOA-no_delay_cmp.wav
Edited by Tapani Pihlajakuja