There hasn't been a whole lot of word released about the new interface and sounds. Hopefully we'll get more information about it soon, it would be nice for them to have different sounds for different notification's though.
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Hey there Ducky Style, I've often wished that we could choose our own sound effects for notifications too, that would be a great feature. I would suggest that you post at the link I'll provide below, you never know, they may incorporate something like that
in the next console if enough people want it!