Major spectral difference between signal decoded from fixed- and floating-point encoded bitstreams at 13.2kbps for OSBA inputs

Basic info

• Float reference:
  • Encoder (float):5067d70d
  • Decoder (float):5067d70d
• Fixed point:
  • Encoder (fixed):6a0b7021
  • Decoder (fixed):

Bug description

Input format: ISM4_SBA3

Input level: -16LKFS

Sample rate: 32/48 kHz

Encode bitrate: 13.2kbps

Observations: major spectral difference, see screen capture below for an example (W channel of decoded signals with test item bm6ba1s01_am4aa1s01)

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1287