MP3 files but AAC format...possible?

[melvyn]

I have a Lumia 620 which comes with a free 6-month subscription to download DRM-free music. I downloaded tons of MP3 songs from my smartphone using a data connection.

When I looked up the MP3 file properties on my PC (with MPC-HC), I noticed that the format was AAC. The bitrate was quite low....around 32kbps something...but the music was still pleasant to listen to and as good as I've found on music streaming sites.

But is it possible for an MP3 file to have been encoded using AAC, and not have the .aac file extension?

Thanks..

 

[rgd1101]

if you can play it on a pc. yes it possible.

 

[andrew_berge]

That doesn't seem right to me. Mp3 and AAC are both an encodings. They are two ways to do one thing, you can't have both.
Do you have any other programs that you can check the properties with?