^^ FLAC is a type of lossless audio codec used by hardcore audiophiles. Unlike MP3 which compresses music only to the audiable spectrum (and even that is mostly compressed) FLAC (which includes filestypes such as .flac and .aac) uses more basic RAR compression on actual .wav files, therefore it does not lose any actual audio signal.
Mike, i dont know of any headunits that will decode those formats. If you're getting that serious about sound, run a carPC directly to an amp. You can't beat that kind of control/quality over audio quality.
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