I searched all over the site on this one, but didn't find this specific question addressed. I see some cd-r discs sold as "data" discs, and others for "audio". In my experience, data cd-r discs usually play fine when burned in audio cd format. I've seen reference to those categories in these forums, but haven't seen an explanation of what the difference is. I assume that it has something to do with Red Book and/or Orange Book conventions. Any enlightenment that can be provided on this issue is appreciated. Thanks.