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.

gdhal
On the grand scale of things that make a difference in sound quality, I have found digital cables and file format (.wav versus flac) to be pretty much the least significant factors. I'm sure YMMV.
Without going into great details I would say I have an above average system.  To me wav. is better than flac.  Not a lot, but better.
ddriveman made the perfect post. For discussion across everyone's systems his points reach the conclusions that will usually apply. Bottom line use AIFF or WAV, if if metadata headaches bug you, like they do me, use AIFF. Cheers,
Spencer
One more vote to WAV files, altough I found sacd and high fidelty pure audio( blu ray) better in that order, so even most of my music are on cd, i prefer sacd.
I have been looking at flac compression levels some more .Let me clarify uncompressed flac, since I confused flac 0 and uncompressed above.

Flac 0 is not uncompressed. It is the lowest level of flac compression, but it is still far from uncompressed. Many packages create flac 0, but dBpoweramp is the only one I know of that does truly uncompressed flac. There may be others, but dBpoweramp is the one I know.

As an example, I have a track that is 69KB (39%) at flac 6. It is 73 KB (42%) at flac 0 and 122KB with uncompressed flac. AIFF and WAV are also 122KB. So, if you want flac with no compression you need uncompressed flac, not flac 0.

Flac and WAV both have well defined meta-data capabilities. WAV originally did not include meta-data, but many implementations do include meta-data today, although the implementations can vary. So, if using meta data, flac and AIFF are the preferred formats.

Conclusion - If you want an uncompressed format use uncompressed flac (not flac 0), or AIFF, with WAV an option if you understanding the tagging issues.


The higher the compression level, the more compute time  needed to do the compression. However, people who understand the flac compression algorithms say that the time to decompress the various levels (0 to 8) are basically the same. That may not seem intuitive but there are good explanations from the for the people who know. Uncompressed flac, however, should take not time to decompress, since it is not compressed.

Hope that helps clear up flac 0 and flac uncompressed. They are different.