TUTORIAL | Fix Katsukity n3DS_viewer USB Audio Glitch/Bug/Skipping
In short, mind your CPU and Memory. Close any external applications and disconnect any extra devices. If you want to use a mic or webcam to stream and capture 3DS footage, you might need a more powerful CPU. I do believe that this is a CPU issue. I'm working with an i5-2500k. This is specifically for people trying to record offline... However, I didn't try connecting only one of my mics or webcams. You might also close additional programs too.
This, very vague, post from Katsukity helped me diagnose my issue...
http://nisetorocapture.freeforums.org/the-sound-get-fuzzy-t87.html
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