read all of my posts above - when you play flac, it has no fixed bitrate, its variable, but when you play wav, you have one bitrate, and thats what i mean about it.
nor did i say that it loses in audio quality, just some bits that would probably be visible on some spectrograph or smthn, but not the sound itself, as i said, you wont notice any difference from wav and flac, except that flac sounds bit silent than wav.