I don’t think I’ve ever seen an 8-track…
I’m actually decent with different audio formats, but I couldn’t say for certain what .CDA files are. I’ve always thought of them as “pointers” to different locations in a PCM file on a CD, sort of like directions to the beginning of different tracks.
Right or wrong, the audio on your music CD is PCM data–a stream of 16-bit samples at a sampling rate of 44,100 samples per second per channel. The WAV files you get after ripping a CD also contain 16-bit 44.1kHz PCM data per channel, just like the CD. It’s the same audio data, just stored in a different manner. A CD authoring program like Burrrn, Nero, etc., has no problems burning these files onto a CD in CDA format. There isn’t any loss of audio quality.
Anyway, sorry if this doesn’t answer your question. I guess it boils down to this: the CD Audio format is how PCM data is stored on a commercial audio CD for playback on standalone CD players; a WAV file is a plain old data file that can store the same PCM data.
Hmm. Now I’m confused.