Level differences between MC rendering to stereo and binaural
We noticed internally that the output level for MC can vary between stereo and binaural. E.g. ``` ./IVAS_cod -mc 5_1_4 128000 48 scripts/testv/stv514MC48c.wav bit ./IVAS_dec stereo 48 bit out_stereo.wav ./IVAS_dec binaural 48 bit out_binaural.wav bs1770demo -nchan 2 out_stereo.raw bs1770demo -nchan 2 out_binaural.raw ``` Gives `Input level: -20.877463` for stereo output and `Input level: -11.101193` for binaural output. The difference is also quite apparent from the waveform/spectrogram: Stereo output: ![Screenshot_2024-06-24_at_12.36.56](/uploads/fe16e731260519939420a1e706ff91f0/Screenshot_2024-06-24_at_12.36.56.png) Binaural output: ![Screenshot_2024-06-24_at_12.37.00](/uploads/a9f9687fa493a4949aab795a1cebbe7d/Screenshot_2024-06-24_at_12.37.00.png) When encoding at 80kbps, the output level is about the same, so this is probably subformat-specific. <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary. -->
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