OMASA Rendering to HOA3: High differences between float and BASOP

Basic info

• Float reference:
  • Renderer (float): efe53129c9ed87a5067dd0a8fb9dca41db9c4add
• Fixed point:
  • Renderer (fixed): ac900052

Bug description

For rendering the OMASA (4ISMs, 2 MASA TCs) LTV to HOA3, we see relatively large differences between Float and MASA:

Max Diff = 21976 (67.07%)

There are many diffs across the whole signal, but one large outlier at approx. 1:22.00:

Ways to reproduce

IVAS_rend -i ltv16_OMASA_4ISM_2TC.wav -if ISM4MASA2 -im ltv48_OMASA_4ISM_2TC_ISM1.csv ltv48_OMASA_4ISM_2TC_ISM2.csv ltv48_OMASA_4ISM_2TC_ISM3.csv ltv48_OMASA_4ISM_2TC_ISM4.csv ltv48_OMASA_4ISM_2TC.met -of HOA3 -o out.wav