is it ok if i increase the audio bitrate

[cns00]

i have two movie files for the same movie: one movie file has 128 kb/sec aac audio and it's a .mp4 file. the other one has 96 kb/sec aac audio and it's a .mkv file. i compared the loudness of both movie files at the same volume level and it looks like the .mp4 file is a bit louder than the .mkv file

i installed audacity and i opened the .mkv file in it, i went to effects and i used the compressor so i can increase the loudness of the audio. i want to export the audio to aac but i don't know if i should use 96 kb/sec or 128 kb/sec

i don't think that the audio quality will improve if i use 128 kb/sec but i think that the loudness will be more than if i use 96 kb/sec. am i correct?

[LigH.de]

The bitrate is related to the amount of quality loss (in the sense of audible annoying artifacts), the loudness (or volume) depends on other factors. It could be related to different downmix matrices, or a different preprocessing (e.g. normalisation), or different header metadata.

No matter how you process your audio tracks, use enough bitrate (or quality level) to avoid causing more compression artifacts.

[Hoser Rob]

... i think that the loudness will be more than if i use 96 kb/sec. am i correct?

No. The bit rate has nothing to do with it.