So far, I didn’t want to write a full article on listening to the music clips (SID files) of the legendary Commodore 64 home computer (dedicated Wiki page HERE). Now that the latest, just-released (brand new) version of the dedicated player, Sid Player Pro has greatly (!!!) reduced the power consumption and become pretty much usable on previous-generation iDevices (iPhone 2G/3G and iPod Touch G1/G2) as well, I find it necessary to, at last, dedicate a full article to the question.
There are several ways of listening to C64 music on the iPhone. Your choice should depend on the following factors:

