OSBA Magnitude Mismatch (4x Gain) in Binaural Room Reverb with Trajectory

Basic info

• Float reference:
  • Renderer (float): 38c95a2f5
• Fixed point:
  • Renderer (fixed): 6dff3bfd

Bug description

A significant amplitude discrepancy (approx. 12 dB / 4x factor) has been observed between the BASOP and Float versions of the renderer. While the waveform shape and timing (phase) are aligned, the magnitude in the BASOP version is scaled up significantly.

Ways to reproduce

./IVAS_rend -i scripts/testv/ltv48_OSBA_4ISM_HOA3_trim.wav \
            -if ISM4SBA3 \
            -o out.wav \
            -of BINAURAL_ROOM_REVERB \
            -fs 48 -no_delay_cmp \
            -im NULL NULL NULL NULL \
            -T scripts/trajectories/full_circle_in_15s.csv -fr 20