High band difference in external renderer MASA2 to MONO / 5.1

Basic info

• Floating point:
  • Renderer (float): f40fa467
• Fixed point:
  • Renderer (fixed): bef2d70c

Bug description

External renderer MASA2 rendering to MONO or 5.1 output has significant differences compared to float renderer in frequency region above 12 kHz. Below is a spectrum from mono output, but 5.1 exhibits similar pattern. The differences are not visible in binaural output.

Ways to reproduce

Using STV.

Commandline:

IVAS_rend -if masa2 -i scripts/testv/stv1MASA2TC48c.wav -fs 48 -im scripts/testv/stv1MASA2TC48c.met -of MONO -o 0011_stv1MASA2TC48c.wav_MONO.wav