Making copies of audio CDs provides a backup in case the originals are lost, damaged or stolen. If you have the right equipment, you can copy an audio CD to a blank DVD instead of a blank CD.
As long as you have a DVD burner and its accompanying software, you have the tools you need. In the United States, you generally may make one copy of a copyrighted music CD for personal use.
Some legal jurisdictions, however, put limitations on "format shifting," which is what happens when you extract music from your CD to another format, such as an MP3 file on your computer.
If you have multiple optical drives, you can copy the music data from the CD to the blank DVD and avoid format shifting.
Car stereos and dedicated CD players typically cannot recognize music DVDs. A DVD requires a different laser to "read" its surface.
If your concern is being able to fit a large number of songs onto an optical disc, you can extract audio from a CD and convert it to MP3 files. As long as your music-playing device can recognize MP3 files -- and many car stereos do -- then you can burn those MP3 files onto a blank CD and listen to them.
- CD's image by Andrew Buckin from Fotolia.com