It takes up less space then MP3 and it supposedly is better quality then MP3.
When you buy something from the iTunes store, they're music is in AAC format.
An 8gb ipod can hold around 30,000 songs. (AAC/MP3 128kb/s)
Yes, the iPod will play .mp4 and .mp3. .mp4 files are iTunes songs as you originally downloaded them, and .mp3 files are either converted files that you converted in iTunes or files that you did not get through iTunes. The iPod supports a variety of audio formats: AAC, Protected AAC (from iTunes Store), HE-AAC, MP3, Audible, Apple Lossless, AIFF (as found on CDs), and WAV.
it is the native audio file type for iphone and ipod
14,000 songs in 128-Kbps AAC format.
AAC format, it is unprotected, and the only format that actually works on an iPod. If they are other formats the iPod just converts them...
To add a CD to an iPod first import it into the iTunes library where it can be converted to MP3 (or AAC) files which can then be added to the iPod. (See links below)
Copy CD music to localhost and convert audio to iPod compatible format(mp3, aac, m4a).
The iPod Touch supports many popular audio formats including: AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), HE-AAC, MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, WAV
The AAC file format is all I know. Maybe the only one.
It is if you dont have an MP3, Nick Fusion, Ipod, ETC. BUT THE MUSIC FILES HAVE TO BE IN AAC FORMAT
You can play songs from anywhere on an iPod Touch providing they are in a suitable format - AAC , MP3, Audible, Apple Lossless, AIFF or WAV. These can be from the iTunes store, Amazon, or any other retailer with a download service, or from your own CD collection. Tracks from CDs are in the AIFF format which takes up a lot of space on your iPod but the iTunes software can convert these to the more compact MP3 or AAC formats.
A .3GP file is a container that may well contain MPEG video or AAC audio that can be played by an iPod/Touch. Put the .3GP file into iTunes and see if it syncs with the iPod. Otherwise it will need converting with VLC or MPlayer or somesuch.