Audio Clipping at Random Times in Capture

[artemisc]

My VHS captures have some audio glitching. The glitching happens at different times each capture, which is good because I can record twice, splice together the good parts, and cut out the glitchy parts. But I'm wondering if anyone can tell me what's causing this so I don't have to go through the trouble of editing the audio. I record without any other programs running on my computer, and I restart the computer before beginning, so I don't believe it's related to CPU activity. The video doesn't glitch along with the audio, it seems to be its own issue.

Here are some examples of the problem. You can hear it at 0:01, 0:04, and 0:06.