Spike in BASOP encoded signal of MASA selection material

Basic info

• Float reference:
  • Encoder (float): b63c033f
  • Decoder (float): b63c033f
• Fixed point:
  • Encoder (fixed): a6ac7971
  • Decoder (fixed): a6ac7971

Bug description

There is an audible and visible "spike" in BASOP encoded signal (at 4 s shown below) using the provided input and command line. There is a transient also in pure float version but it is significantly emphasized with BASOP encoder.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1499

Following command line and input from Box

IVAS_cod -masa 2 BASOP_Selection_MUSHRA-7ad_s04.met -max_band swb -dtx 16400 48 BASOP_Selection_MUSHRA-7ad_s04.wav test_0971.bs
IVAS_dec EXT 48 test_0971.bs 0971_BASOP_Selection_MUSHRA-7ad_s04.wav_16k4_48-48___EXT.wav