“Chip manufacture Portal Player in San Diego US build the embedded PB5502B-C chip in Apple’s iPod. This is the chip that allows the playing of AAC and MP3 – However what is interesting is that the chip firmware by default also allows the playing of WMA,” DanceFrontDoor reports.

“It looks like for some reason this is locked by Apple. The Portal Player chip is used in other Mobile Media Players and by default allows all three formats,” DFD reports.

Full… [MacDailyNews]