▁is ▁associated ▁with ▁one ▁host ▁computer . ▁Each ▁time ▁an ▁i Pod ▁connect s ▁to ▁its ▁host ▁computer , ▁i T unes ▁can ▁synchron ize ▁entire ▁music ▁libraries ▁or ▁music ▁play lists ▁either ▁automatically ▁or ▁manually . ▁Song ▁ratings ▁can ▁be ▁set ▁on ▁an ▁i Pod ▁and ▁synchron ized ▁later ▁to ▁the ▁i T unes ▁library , ▁and ▁vice ▁vers a . ▁A ▁user ▁can ▁access , ▁play , ▁and ▁add ▁music ▁on ▁a ▁second ▁computer ▁if ▁an ▁i Pod ▁is ▁set ▁to ▁manual ▁and ▁not ▁automatic ▁sync , ▁but ▁anything ▁added ▁or ▁edited ▁will ▁be ▁revers ed ▁upon ▁connecting ▁and ▁sync ing ▁with ▁the ▁main ▁computer ▁and ▁its ▁library . ▁If ▁a ▁user ▁wishes ▁to ▁automatically ▁sync ▁music ▁with ▁another ▁computer , ▁an ▁i Pod ' s ▁library ▁will ▁be ▁entirely ▁w ip ed ▁and ▁replaced ▁with ▁the ▁other ▁computer ' s ▁library . ▁ ▁Interface ▁ ▁i P ods ▁with ▁color ▁displays ▁use ▁anti - ali ased ▁graphics ▁and ▁text , ▁with ▁sl iding ▁anim ations . ▁All ▁i P ods ▁( except ▁the ▁ 3 rd - gener ation ▁i Pod ▁Sh uffle , ▁the ▁ 6 th ▁& ▁ 7 th ▁generation ▁i Pod ▁N ano , ▁and ▁i Pod ▁Touch ) ▁have ▁five ▁buttons ▁and ▁the ▁later ▁gener ations ▁have ▁the ▁buttons ▁integrated ▁into ▁the ▁click ▁wheel ▁– ▁an ▁innov ation ▁that ▁gives ▁an ▁un cl utter ed , ▁minimal ist ▁interface . ▁The ▁buttons ▁perform ▁basic ▁functions ▁such ▁as ▁menu , ▁play , ▁pause , ▁next ▁track