How do you change the file types?

I've had trouble with this. How can you change the file type from an MP3 format? does anyone know because after i burn a cd, i cant play it in my stereo nor car because they cnt play mp3 formatted music cd's.

You cannot play mp3 files if your player does not have that facility
You will have to burn CD's in a different format
For you all files should end with the file extension .cda
Files with the mp3 extension are classed as data files
To burn CD's that will play in your ordinary player you need to burn disks where each file has the file extension .cda
With the mp3 extension you can fit about 90-100 music files on each disk
Whereas files with a .cda extension will be like ordinary CD's and you can only fit about 12-15 songs on each disk.