Sudden drop in frequency of a music video

[jacobpappoSCAD]

Hi, I'm a new user of Audition CC 2015. I have a video recording of a concert that I took with my video cam and saved on an SD card. The first 15 minutes were perfect and then all of a sudden I got a drop in the frequency level (see attached image). I've been trying to fix it using Audition CC 2015, I tried researching and finding a solution with no much success. Can someone point me in the right direction or things that I should try to do in order to fix this?

Thank you! Much appreciated,

JP

[emmrecs]

I think this will work, but the chances of fully restoring the audio to match that of the first section are pretty slim.

If you highlight the whole of the quiet section and then use the on-screen "volume" control - it's there on your picture, on top of the "loud" section - to increase the level, that will produce some increase in volume and noise.  Looking at the frequency spectrum display, my suspicion is that a lot of what has been recorded is noise, but you may be lucky.

You ought also to be concerned as to why this happened.  Looking at the levels on the loud section, which are almost certainly clipping quite extensively, I think, it's almost as if your camera's audio AGC (automatic gain control) has completely ceased working due to (?)overload.

[SteveG_AudioMasters_]

The original says 'fall in frequency' and looking at the RHS of the spectral display, it certainly seems like it. For the life of me, I can't imagine how it could have got like that though; that's not what cameras do.

It would be easier to come up with a more definitive answer if we could have a copy of the actual audio...

[jacobpappoSCAD]

Hi Steve,

I figured it out and attached the url.

Thanks!

Jacob

[SteveG_AudioMasters_]

Okay, I've listened - it's not a drop in frequency, but as emmrecs suspected, just a (massive) drop in volume. His solution above is the correct thing to do, and yes you will end up with a lot of noise in it - but I can hear that the audio is actually there, so it's worth doing. Basically you want the raised level on the right up about where the level on the first (LHS) is, and you may have to use the control twice to do this, as the amount it will amplify in one go is limited to +15dB, and you might need a bit more than this.

[ryclark]

It also seems to lose a lot of the low end as well when the level drops. Rather than using two bites of the On Clip Gain control cherry you could use Normalise or Amplify from the Effects/Amplitude and Compression menu.

[jacobpappoSCAD]

SteveG(AudioMasters)​, emmrecs​ Thank you guys! SteveG(AudioMasters)​ how can I get you a copy (It's an mp4 video file).

Thanks!

Jacob