+ means downloads are on a leash so have certain restrictions
+ you can download but not burn to CD
untethered
+ you can do anything with the donwload once bought
+ itunes are classed as tethered, however their restrictions are minor so usually end up being classed as untethered
streaming-on-demand
+ virtual jukebox
+ not allowed to copy, just listen
+ free
+ advertisements
+ interactive (you decide what you want to play)
non-interactive webcasting
+ streaming
+ local radio stations
+ adverts
+ subscriptions
satellite radio (ie sirius)
+ non-interactive
+ subscriptions
podcasting
+ free
+ advertising
+ interviews and/or music
+ some companies limit music on podcasts to 30 seconds (viewed as promotional)
For audio streaming, record companies require a percentage of advertisement revenues and/or subsccription fees.
Licensees
+ records are distributed by licensees
+ licensees sign an agreement allowing them to manufacture and distribute music
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