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17 votes

FLAC compression level comparison/efficiency analysis

FLAC compression levels are (only) a trade of between encoding time and file size. The decoding time is pretty much independent of compression rate. In the following I will refer to the compression ...
  • 371
3 votes

FLAC compression options unclear: --exhaustive-model-search, --qlp-coeff-precision-search

They give a small improvement to the compression at the cost of encoding time. As neither requires specifying --lax, they do not make the resulting files less compliant. -8e, -8p and -8ep could be ...
3 votes
Accepted

Are FLAC audio files automatically decompressed by music players?

Yes. Without decompression a flac file contains just pseudo-random data. A media player requires an ordered stream of PCM stereo audio samples in order for them to be converted to analogue audio via a ...
  • 8,620
3 votes

How can I find the audible difference between a flac audio and it's corresponding mp3 file

That depends on what you mean by audible. You can invert the phase of one and add it back to the other and it will play only what the difference between the two is, however you will hear artifacts ...
  • 8,111
3 votes

Is there a losslessly compressed audio file?

FLAC being the most popular one, there is a comprehensive list of lossless compression formats on Wikipedia: http://en.wikipedia.org/wiki/Lossless_compression#Audio Compressed files should be ...
2 votes

How can I find the audible difference between a flac audio and it's corresponding mp3 file

Audible differences is something different than electrically measurable differences. The techniques mentioned (by computing the difference between the two signals) allow to measure differences between ...
  • 2,773
2 votes
Accepted

Why are levels so different on popular music tracks I open in my wav editor?

Basically, you're right with all your points. The level between different albums can indeed be dramatically different, depending on how agressively it was mastered. Records from the early days of CDs ...
2 votes

How can to find the play-time of a `.flac` file?

Total Samples / Sample Rate (Hz) = playback/recording time (s) In this case: Total Samples = 10238256 Sample Rate = 44100 Hz Thus: 10238256 / 44100 = 232.160068027210884 seconds Explanation The ...
2 votes

from Flac to wav

FLAC is lossless compression. During compression, you can set a compression option: setting this to a higher level creates a smaller file that is still lossless by taking more time to process the file....
  • 1,578
1 vote

Spotting a fake flac using spectrogram

This looks "extended" because of the (most probably) linear scale that your spectrogram is using on the frequency axis. It should look way more common if you switch it to log or similar. @...
1 vote

How do I compress 32-bit float PCM a perfectly lossless way?

http://www.wavpack.com/ has the specs of the supported file formats. Wavpack supports both lossless and lossy compression depending on the configuration options selected during processing.
  • 8,620
1 vote

FLAC compression level comparison/efficiency analysis

As a followup to Suuuehgi's answer, I'd also like to add that if you are starting from a CD and ripping it directly to FLAC, encoding time may not matter at all because you have to first rip the music,...
1 vote

Why did the size of my flac file increase after cropping?

Although FLAC encoding is always lossless, it still offers different compression levels to choose a tradeoff between size and decoding speed. So, the unexpected difference in size that you noticed ...
1 vote

Converting WAV to FLAC. Compression level 0 has higher bitrate than 8

There is a limit to the amount of compression you can achieve with a "Lossless" compression algorithm - at some point all the recognizable patterns are removed and your file essentially becomes random ...
  • 8,620
1 vote
Accepted

FLAC --bps setting real meaning

According to the man page, --bps specifies the bits per sample. As far as I can tell, this parameter controls the data that will be encoded using FLAC, and can have a lossy effect. For example, here's ...
  • 145
1 vote
Accepted

Playing FLAC in home theater system that doesn't support it?

Your Sony Home Theater System probably doesn't support FLAC because it doesn't have the codec to uncompress the FLAC audio files. It kind of depends on the features of your hardware and the settings ...
1 vote

Any reason not to convert WAV to FLAC and save some disk space?

I'm struggling with this issue now, as well. The one downside to Flac, that I can see, is that it doesn't support media cues. One benefit to recording in Wav is that I can record a lot of audio at ...
  • 111

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