I think that the treble loss has happened because mismatching the bitrate and the sample rate.
This can happen if the video encoder AVC-AAC is re-encoding the sound from 44.1kHz wav to AAC 48kHz 128 kbps. The fix comes by setting the correct 44.1 sample rate, and get the 192kbps bit rate.
Will see how it sound that on NND after the upload finishes, and if sounds good then I will publish it.