Stereo to MONO decoding: energy drop below 1 kHz

Basic info

• Encoder (float): d18cbee3
• Decoder: 20241023_Ittiam_Decoder_Release_subjective_Testing ( 074e9116)

Bug description

• When decoding the stereo bitstream to MONO, there is an energy loss below 1 kHz at 0:26.6 - 0:40.2.
• It is not present when decoding to STEREO.

Float

BASOP

Difference

Ways to reproduce

IVAS_dec STEREO 48 cut_bs.192 out.wav

Bitstream available here: https://dolby.box.com/s/jcm2ojootxo4vrlkd7t310vesexh5n7d