Am new to creating cd's playable on car or other radio/cd player. Am doing dialogue, vocal vs music. My mike of course recorded in .wav format, and Roxio created cd in cda format, which is around 50mb per 5 minutes. Switching to mp3 means in takes a computer to listen to (or, is this the mode of Walkmans or whatever is used today?). I would like the greatest flexibility of listening modes. Mainly: If I convert from wav to mp3, compressing it, and then convert to cda, will that cda be a smaller file than if it is converted directly from wav? Seeing that mp3 is "lossy", the file should be at least a little smaller. Or ..... is compressing cda's possible if they are still be be played on radio/cd players?