Adding a second router

[Womaz]

To truelly isolate it you would want another subnet and manually set your routing table to get the 2 networks to pass data back and forth.

I really don't see a benefit.  If the switch in your existing router is doing it's job the packets only go where they are suppose to go anyway.  How busy the switch in your current router is isn't going to affect audio quality just reliability. Are you having reliability issues?

The honest answer is I am not sure if I am having reliability issues. My broadband is fast and reliable but I had problems with AIR., I now have problems with certain apps controlling my Melco. Throughout all of this there have been suggestions that maybe my wifi signal was not very good as the routers supplied by Sky etc are not very good.
There was also a suggestion at some stage that to add a second router to use purely for my Hifi may help. I have now been sent a new router but it has new passwords and new Network number so I am not sure if this would help at all.
I have looked various stuff up on the internet but I am none the wiser.