FLAC vs WAV


I have observed (heard and then tested so as to confirm) the following “condition” as it relates to the widely debated issue of FLAC quality. The purpose of this topic is to gather opinions as to whether or not your observations are similar too – and therefore support – my own.

It is widely understood and accepted that a FLAC file while “compressed” is “lossless” as compared to its corresponding WAV file. Let’s assume (i.e. not debate) this is completely true. What I am noticing is that when the FLAC file is “played” via any FLAC player it sounds different from the sound of the “same” (equivalent decompressed FLAC) WAV file when played back via the same player that was used to play the FLAC file. This is specifically noticeable (to me) in the low frequency spectrum. The WAV has considerably more “sonic energy” that manifests itself as appearing to be a bit louder, wider in frequency range and perhaps even dynamic range as compared to the FLAC equivalent.

I’m curious as to your findings when you compare a FLAC file played natively as compared to the WAV equivalent played via the same player (for example, play both the FLAC and WAV via VLC media player) or practical equivalent, such as if the FLAC was burned to CD and you are comparing the FLAC played via VLC and the CD played via a CD player.

I am further assuming that the WAV file is a more accurate representation of the audio than the FLAC. This is to say that should you agree with the aforementioned, it would be preferable to play the WAV file or decompress the FLAC file before using it.

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I believe, Reference Recordings primarily produces HDCD discs. I would not be surprised if he used wav in his processing. He would have little reason to compress data while doing the engineering. Can you point to a reference about Johnson preferring wav? It would be interesting reading.
Steve N., you have previously stated that to you WAV sounds better than AIFF.  Do you still feel that way and/or have any idea why?
I use XLD for ripping.  Playback is via an Ayon S-5 pulling files from a NAS drive.  Playback control is via JRiver.  Before ripping my complete CD library I tested the AIFF and WAV formats of some of my usual demo CD's.  AIFF gave superior performance - significantly more separation of voices and instruments in the soundstage and faster transients, especially in the attack on acoustic strings.  From my experiment I concluded which format sounded better on my system but the only recommendation I would ultimately make would be to test the various formats of interest on one's on system for as the saying goes, "Your mileage may vary."
Something interesting (to me anyway) I have discovered. As reported by Windows Properties size (not size on disk), a WAV encoded to Flac (compression level 6 but realistically any) and then back to WAV from that FLAC is not identical. For example, if the WAV is 399,718,326 bytes and converted to FLAC it is 188,443,075 bytes. If I then decode the FLAC back to WAV the size is 399,718,324 bytes. Can that 2 byte difference be explained?