Here is a higher end extractor.
However I wonder if your problem may be in how you are recording and making your audio Wav. files. This takes some skill. To do it professionally requires a Digital Audio workstation loaded with pro software.
I use WaveLab loaded on my DAW
water valve repair. I just have a feeling you are not keeping track of your bits and bit rate.
Not being able to monitor this properly when making audio recordings leads to huge issues of distortion and artefacts.