spectral distortion observed in signal decoded from 13.2kbps bitstream encoded by fixed encoder with FOA input at -16LKFS

Basic info

• Float reference:
  • Encoder (float):ecb2d1dd
  • Decoder (float):ecb2d1dd
• Fixed point:
  • Encoder (fixed):b1680a6d
  • Decoder (fixed):

Bug description

Following is the W channel of the 16kHz test outputs. Similar issues were observed in both included test vectors and across all channels.

Input vector: am5ba1s11

Input sample rate: 16/48 kHz

Input level: -16LKFS

Input format: FOA

Bitrate: 13.2kbps

MLD: ~25

Regression: MLD at ~10 at commit 24cb7eef

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1317

See cmds.txt in Box folder for command lines.