Streaming audio isn't very CPU intensive so I don't think an Atom should have much of an issue with it.
"The reasonable man adapts himself to the conditions that surround him... The unreasonable man adapts surrounding conditions to himself... All progress depends on the unreasonable man."
If you're just going to use one for audio playback, yes it'll be fine. I wouldn't use it for audio encoding though. Even though audio encoding isn't terribly CPU intensive by today's standards, it'll be pretty damn slow on a netbook.
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