Details: I have a mac and I have want to convert my AAC-Plus files to AAC so I get the full quality on my ipod, since AAC-Plus is not supported. The AAC-Plus files are in .m4a file and contain album art and artist and title meta data. The files are 64kbps and I want to convert them to the older AAC codec at no more than 128kbps. I assume keeping it AAC would help, but I'll do mp3 if that works better. I want to keep the header/ meta data that is the artist and song title and end up with a good sounding file. The AAC-plus on the ipod doesn't sound very good since it ignores the plus data. Thanks.

Don't know of any tool that does all you want. AACplus is quite different from AAC (LC), so you have to convert your AACplus files back to WAV (or AIFF on Mac) and then to AAC.

Regarding the metadata, sorry, can't help you. You might have to type in the data manually into your target AAC file.

Chris

You shouldn't have to do a conversion to WAV and then to standard AAC. foobar2000 should be able to automate the process of converting the HE-AAC files to LC-AAC while preserving the metadata. Just make sure that you download Nero's AAC encoder (their website linking to this download has been down for a long time, you can find it by searching the forums).

http://www.nero.com/eng/downloads-nerodigi...o-aac-codec.php

Isn't that a lossy codec simmilar to mp3 pro? I think the sound quality won't be very good if you do that conversion. If you have original CDs, it would be better to re-rip them.

The website I knew about was nerodigital.com. It has been down for a while now (more than a few days). Thanks for posting the link though.

To the OP: I just realized that you are on Mac OS X. You won't be able to use foobar2000. Instead, you may want to try MAX. Many argue that it is the best Mac OS X cd ripper out there and it can handle the conversion between different file formats (while preserving track tag information). I have a friend that uses this to convert his FLAC files to mp3 using the Lame mp3 encoder.