MP4 is a container format that can be used to combine video, audio, photo, and text into one single file. It's not as cut and dried as being able to say that a player will be able to play MP4 files. AMR is an audio format designed just for speech, which you would never want to use for music. I have no idea what ACC is, but AAC is an MP4-compliant audio format that's used by iPods with the file extension of M4A. Songs downloaded from iTunes will only play on iPods and the iTunes program when kept in their original AAC format due to DRM encoding. Songs ripped into iTunes from CD do not have any DRM encoding, and should play on any other player that will support the AAC format. Note, however, that Apple Lossless also uses the M4A file extension, and is only playable on iPod, no matter how it was created. Those files will use up about 50% of the space used by the original audio file, which means a 30GB iPod would only be able to store about 90 CDs in this format (the same basic rule holds for any other 30GB player and any "lossless" format that it may support), while the same 90 CD's could be compressed down in the AAC format to fit on a 4GB Nano.
So, CDs ripped to M4A should be playable if they aren't in some Lossless format (the largest single CD that I have ripped down to 75.3MB, while most were in the 50MB range, and most CDs ripped into a Lossless format will hit in the 250-350MB range). Anything else won't, but the only way to know for sure is to give it a try. Just remember that most people who own iPods will download from iTunes, and those libraries will be off-limits to your player.
2007-01-30 19:49:55
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answer #1
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answered by the_amazing_purple_dave 4
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