Can anybody explain these settings in Protune- RAW Audio:? Do these settings affect also affect audio track in mp4 file OR just wav file?
- Low: Applies minimal processing; ideal if you apply audio processing in post-production : What minimal means ? Does it mean "none"? If not, what kind of processing is it?
- High: Applies full audio processing (automatic gain and AAC encoding). : What does AAC encoding mean? I know that audio in MP4 files is anyway aac . (It would be nonsense to make lossy aac encoding and then wrap it into lossless wav file) But what does this mean in the context of separate audio file (.wav) .
What kinds of audio volume processing exists in the audio processing pipeline for .wav and fro.mp4 file for each settings?
Is there one type (like static volume offset like +12dB) or is there also normalizer (volume offset based on smaller time window)?
I recorded movies with Raw audio =minimal. I was surprised when the audio track in the mp4 file was a bit quieter than ZERO dB. (-15dB, mean -34dB). But the WAV track is defininely recorded without volume boost (-72dB, mean -85dB) as expected.
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- Question 3: Does the "RAW audio setting(Off,Low,Med,High)" affect the audio track of the mp4 file?
- Question 4: Is the audio track from mp4 file same* as the wav track from wav file In the High Setting? ( *except the difference made by audio mp4's aac compression, which is lossy by nature. But for comparison, I consider them same.)
** note the WAV file is non-standard wav, it has four channels, first two are supposed to be Left and Right, third channel 'center' / vibrations / bass-picker and fourth channel is the SILENCE.
Answers from here are insufficient.
(More questions here (regarding channel mixing, unanswered)
https://community.gopro.com/t5/Cameras/How-do-wind-reduction-and-stereo-mode-work-exactly/m-p/50514
