Unavoidable HDMI recording audio glitches and their fix

Been noticing some unavoidable noise when capturing from a certain HDMI source. It always sounds like scrunching up a newspaper, happens about once per 20 minutes, and looks like this in Audacity:

I've found ripping the raw wav and loading it in Audacity is both the best way to find the glitch at all, as well as the only way to fix it. So at this point I recapture and get a clip of the audio without the glitch, and replace this audio. 

This is already zoomed in, but I like to zoom in even further, to the point where the thin lines of the waveform become thick again. Then I just line up the audio and mute out the bad portion. It's sort of touch-and-go at this point; it's not as easy as it should be. I try to find an identifiable peak, trim the clean audio, move the cursor to the top (bad audio), and mute. Maybe not even that order. 

In AviSynth, I load like this: 

rawfile1v=LWLibavVideoSource("Untitled 115.avi")
rawfile1a=LWLibavAudioSource("Untitled 115 fixed.wav")
AudioDubEx(rawfile1v, rawfile1a)
stream1=last
rawfile1=last