FLAC Uncompressed [How to Convert? 2022]
audio file converter for music production and hi‑end audio

FLAC Uncompressed [How to Convert? 2022]


FLAC uncompressed is a file that contains content in Free Lossless Audio Codec format without size reduction. Read about sound quality, FAQ and comparison with WAV, uncompressed FLAC settings in the audiophile sound converter software AuI ConverteR 48x44.

Watch and share: How to split CUE FLAC


Uncompressed FLAC vs WAV


There is the hypothesis, that Free Lossless Audio Codec uncompressing process causes additional noise. Still, there isn't serious research on this subject.
To avoid uncompressing WAV format may be used.

Watch and share: WAV and FLAC binary content comparison

The hypothesis to explain the sound difference:

When the compressed file format is unpacked, central processor unit of computer (or processor of a music device) has a higher load. Therefore, noise in the system by processor is higher and sound is degraded despite binary identical data coming to digital/audio converter (DAC).

How to check it:

It may be checked via spectral comparison of analog output of DAC during playback alternative formats.

However, there are may be some details, that should be accounted for to avoid wrong results. The author thinks, that it is sound system implementation matter rather. And for the exact answer to the question, serious researches are need for number of systems/devices.

However, WAV has displaying metadata (music track information and artwork(s)) issues at some players. Because WAV contains no standard meta tag implementation and uses custom data block with ID3 format.

FLAC has standard meta tag implementation and must be supported by any player, that is comparable with the format.

Both of these alternative formats have partial compatibility of metadata. Though some issues may happen due to implementation.

WAV vs FLAC format (uncompressed)

  FLAC uncompressed WAV
Sound quality Same to WAV (binary identical sound content) Same to FLAC (binary identical sound content)
Size Depend on metadata and frame size and about packed PCM sound data Depend on metadata and about packed PCM sound data
Metadata Standard FLAC's implementation like id3 or LIST chunks (data blocks). May have compatibility and display issues with some software and firmware



FLAC uncompressed


FLAC uncompressed vs compressed

For sound quality no difference between compressed and uncompressed FLAC. Because any lossless file contains identical unpacked binary content for single original audio stuff.

There is the hypothesis, that FLAC uncompressing causes additional noise due higher computer load. But there is no safe evidence.


FLAC compression level settings


  1. At the main window of the software push Settings button.
  2. At the Settings window select General tab.
  3. Set compression level with FLAC compressing slider (most left position).
    Free Lossless Audio Codec uncompressed is most left position.
  4. Push OK button.

Settings: uncompressed FLAC

FLAC uncompressed settings


Size and binary content of FLAC files


FLAC is divided into frames. Frames may be assigned inside a conversion software. So, different conversion utilities may have slightly different Free Lossless Audio Codec uncompressed file sizes.

Also, padding (free space reserve) may cause various file sizes. The reserve is used to faster metadata saving without full file re-writing.

Unpacked binary audio content doesn't depend on converting tool and compression level.


Minimum price AuI ConverteR configuration

AuI ConverteR has several price/functionality options that allow saving your budget for the required functionality. You can expand Modula-R abilities later via purchasing new modules.

* All prices at this page in the U.S. dollars without V.A.T. and other applicable taxes and fees. The prices are recommended. Information on this page is not a public offer.

[MINIMUM PRICE] configuration for convert
FLAC (uncompressed/compressed), WAV, AIFF, mp3, other PCM
FLAC (uncompressed/compressed), WAV, AIFF, mp3, other PCM
(up to 192 kHz, 24 bit, 32 bit float)

Uncompressed FLAC converter

[MINIMUM PRICE] configuration for convert
(up to DSD128), FLAC (uncompressed/compressed), WAV, AIFF, mp3, other PCM (up to 192 kHz, 24 bit, 32 bit float)
FLAC (uncompressed/compressed), WAV, AIFF, mp3, other PCM
(up to 192 kHz, 24 bit, 32 bit float)

DSD files to uncompressed FLAC converter



You can either buy unlimited-time license and pay for major updates (... 10.x > 11.x > 12.x > ... versions).

Full functionality





Frequently Asked Questions

Is FLAC uncompressed? Is FLAC compressed? Can FLAC be uncompressed? Is FLAC compressed or uncompressed?

FLAC audio content may be losslessly compressed by size or not, according to user option. Compression is there or not, it doesn't impact sound quality.


What compression does FLAC use?

FLAC use file size compression. The compression has several levels. Also, in some applications, FLAC may be uncompressed.


What is FLAC level?

FLAC level may be understood as compression level. It defines the balace between the compression speed of a source file to .flac and the FLAC-file size. Compression level doesn't impact to sound quality.


What is the best FLAC compression level? What level of FLAC compression is best? What FLAC level is best?

FLAC compression levels define ratio between FLAC files size and time of compression to the file.

There is no big difference between compression levels by size. Thus, level 5 (average between the minimum and maximum) may be recommended as optimal (the best).


Is FLAC better than WAV? Is FLAC better than AIFF?

For sound quality no difference. The author supposes, FLAC has wider metadata compatibility with a device and software, than WAV and AIFF. And FLAC has a lesser file size. However, sample rate and bit depth of FLAC is limited 32 bit / 384 kHz. Read more...


Does FLAC lose quality?

No. FLAC fully keeps original audio data. FLAC is true-lossless sound format.


Is uncompressed audio better?

If compression is lossless, it does not matter the uncompressed or compressed audio format.

Lossy compression has losses (distortions), comparing losslessly compressed or uncompressed audio.


Is FLAC lossy or lossless? Is FLAC true lossless?

FLAC is true lossless always independently on level of compression, including uncompressed one. Read more and watch video...


Is FLAC really lossless?

Yes. Any FLAC codec is always lossless. However, FLAC may be used as a container for lossy audio data. Read more and watch video...


Does FLAC compression level affect quality?

No. FLAC keeps lossless for any compression level, including uncompressed option. Read more and watch video...


Is FLAC 16 or 24 bit?

FLAC supports bit depths 16-, 24-, 32-bit by user option and audio software abilities.


What is the compression rate of FLAC?

Compression rate of FLAC is [compressed FLAC size, bytes] / [source uncompressed file size, bytes] ratio.


How much does FLAC compression?

To pre-estimate FLAC compression, you can use 0.6 of uncompressed source size.

As example, when converting CD to FLAC, we can expect 420 MBytes for 700 MBytes of a CD-audio.


Is FLAC better than 320 Kbps?

FLAC is a lossless format. At the moment of the answer writing, available formats with bitstream 320 Kbps for 44.1 kHz / 16 bit (in instance: mp3, AAC) are lossy.

So, technically, FLAC is better by the sound quality. But, lossy formats allow save free disk space.


Read more about FLAC

January 30, 2022 updated | since October 24, 2017

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All prices at this site in the U.S. dollars without V.A.T. and other applicable taxes and fees. The prices are recommended. All information at this site is not a public offer.

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