clarification on music Options

[- p i n k m a f ...]

ok, i understand that a lot of musc urls are found on sereval of those music xanga sites where you can right click &copy their urls for those songs. i totally get that.

a lot of those links are those "mtvrdstr.download.akamai.com" types

maybe i'm just purely uninformed + slow but where do all those music xanga sites get those "g.vm.akamaistream" type urls in the first place?

THANKS in advance for answering my slow curiousity. i've looked through many topics and even forums but no one has really answered or maybe i'm just really not into this kinda stuff.. i'm sorry either way