It's not FLAC that gives the file quality. That's merely a lossless, compression algorithm. It's the sample rate and bit depth, and most importantly the mastering, that gives the file quality. ALAC is Apple's equivalent of FLAC. FLAC isn't compatible with iTunes while ALAC is. That's good if you also want your music library to be portable to iDevices. You can always transcode between file types without loss.
Check the spec of your CD player. If based on the Oppo it will play FLAC files. Just stick them on a USB drive and navigate to Media in the menu system.
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