Yes you can, but they only play on a dvd player. You can also make a data/mp3 cd as well that will play on most dvd players. I use the dvd for back up only. Since an mp3 cd will hold 150-300 mp3's, that is more than adequate for most situations.
I make music CD's all the time with RealPlayer. Can DVD's be used to record music? The ones I bought hold way more - 4.7GB. Simple question, but I'm a little confused about all the letters. Isn't it all just recorded 1's and 0's?