FCPX 10.2 audio problem

I'm having a problem after I import a video. the audio sounds bad, the levels fluctuate and the quality fluctuates. I know that the camcorder audio is good. I can import audio recorded from a "zoom" and I have the same problem. Is there any way that I can make adjustments within FCPX Is it possible if I upgrade to FCP 10.3 the audio would be better?
Thanks for your help, it's always appreciated.
the following is a message I sent to an associate I've worked with
"The attachment I've sent has audio from a project I'm working on.
I think I have problems with my FCPX. When I loaded you "zoom" audio and brought
it into the timeline and synced it up, it sounded bad (even to my ears). so if
you would, listen to my attachment because at:
4 sec 15 frames to 28 sec 15 sec is zoom audio
28 sec 15 frames to 51 sec 15 sec is camera audio
51 sec 15 frames to 1 min 24 sec 15 sec is both audios
1 min 24 sec 15 frames to 1 min 48 sec 15 sec is zoom audio
1 min 48 sec 15 frames to 2 min 14 sec 20 sec is camera audio
2 min 14 sec 20 sec to end is both audios"

I'd have to see it, I'd have to work with the file.

Hello, and thanks for your reply. By seeing the file do you mean the .fcpbundle? it's 8.52 gigs. But let me ask you another question. If I were to download Final Cut Pro 10.3 [MAS].dmg, would that be a complete new app that had nothing to do with my current FCPX 10.2.1? Because I'm sure that it (10.2.1) has to be "corrupt" since it's the same app that I had on my other mac mini and I was beginning to notice the same problem but not as pronounced as it is on my current mac mini.
OSX 10.10.5
Model Name: Mac mini
Model Identifier: Macmini7,1
Processor Name: Intel Core i5
Processor Speed: 2.6 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 8 GB
And once again, thanks for your assistance.

Chuck

I'd need to see the Timeline, and how your Multicam Clip audio is configured in the inspector.