Originally Posted by Jeremy A-H
The reality is that the sound is probably too compressed for a switch to make a huge difference (although, I could be proven wrong).
I don't know about streaming video but for audio I agree with spinaltap and Silent Angel: a poor switch can generate a lot of noise. I think that good re-clocking provided by the switch also helps. But knowledge on this area of audio seems to be still developing. As said elsewhere, I also found an ethernet filter made a big difference.

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