My guess is that, if you look at the properties of the CD you burned, it will no longer be a flac file. I know there are CD players that play formats like flac, but I doubt a car stereo is one of them? Having said that, the sound quality of the Savory collection is substantially poorer (to me) than my Mosaic Coleman, Lester, etc. Still, the music is great, and well worth having, Here's to Mosaic doing this collection eventually,