mpeg-4 v aac

[Dudley]

Some of the tracks in my iTunes folder are MPEG-4 whilst the rest are in AAC. Can anyone explain the difference please and should I make them all the same (iTunes will convert MPEG-4 to AAC)? I have listened to both and cannot discern any difference in quality. Advice appreciated as always.

[ACtheTROLL]

basically there is no difference ... they are both containers for music and/or video. (not wholly true - compression and quality per kB come in to it along with other factors ... but go with the thought) - and in a player - size matters

the difference is in the player - some support a format - some don't (vhs and betamax) - so it creates a certain exclusivity.

additionally some formats allow the inclusion of drm etc... to cut down on copying
blah blah bla -

should you convert - if it aint broke

but convert a couple - see if there is a drastic size difference

[fo3nix]

AAC is a form of MPEG4. It's just a certain specification under the MPEG4 umbrella.