At what bitrate is AAC *universally* transparent? 2004-11-13 22:11:07 Is there a bitrate where all people tested can not distinguish AAC from an uncompressed file? Has a test of this kind been done?I'd been leaning towards lossless archiving, but given that I want at least one if not two backups I'm thinking about archiving two or three copies of AAC. Should be supported by apple for a long time, so it seems stable enough, and with the money I'd save on HD space I could buy an SACD player and more media. I listen through a very high quality system (ibook-->metric halo ad/da-->audio note soro SE integrated-->audio note an/e-sp speakers) and I don't want to compromise quality but I don't want to use more space than required either.Thanks very much for any thoughts on this.