How to convert from/to uncompressed FLAC
To convert audiophile files from/to FLAC:
- Open audio converter software AuI ConverteR 48x44:
- Click Open files button and select input music file.
- In the main window, Format panel (right middle part), select FLAC or another target format, bit depth, and sample rate.
- Select FLAC compression level (uncompressed or compressed grade)
- Select output directory
In the left bottom of the main window, push ... button right Directory output files field.
It can be an absolute or relative (of the source file) directory.
- Click Start button.
Wait for the conversion to finish. Converted sound files are located in the output directory.
DVD-audio/video, Blu-Ray, DVD/BluRay/CD ISO are NOT supported.
For Modula-R version, SACD ISO, DSF, DFF are supported in proper configurations.
For ISO tracks, DSF, DFF longer than 3 minutes, FREE edition mutes 2-second silence in the output middle and has other restrictions
Free version has processing sound quality identical commercial editions.
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Uncompressed FLAC vs WAV
There is the hypothesis, that uncompressing process of Free Lossless Audio Codec causes additional noise. Still, there isn't serious research on this subject.
To avoid uncompressing, WAV or lossless uncompressed FLAC format may be used.
The hypothesis try to explain the sound difference
When the compressed file format is unpacked, the central processor unit of a computer (or processor of a music device) has a higher load. Therefore, in the system, processor noise is higher. And, computer's electrical noise degrades sound. It happens despite binary-identical data feeds digital/audio converter (DAC) for both compressed FLAC and WAV.
How to check it
It may be checked via spectral comparison of the analog output of DAC. Measurement is applied during playback for each of these alternative formats.
However, some details should be accounted for to avoid wrong results. The author thinks, that it's a matter of sound system implementation rather. And for the exact answer to the question, serious research is required for many systems and devices.
However, WAV has displaying metadata (music track information and artwork(s)) issues for some players. Because WAV contains no standard meta tag implementation and uses a 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 with metadata. Though some issues may happen due to implementation.
WAV vs FLAC format (uncompressed)
|Sound quality||The 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 vs compressed
There is the hypothesis, that FLAC uncompressing causes additional noise due to higher computational load. But there is no safe evidence.Back to top
FLAC compression level settings
- At the main window of the software, push Settings button.
- At the Settings window, select General tab.
- Set compression level with FLAC compressing slider (most left position).
Free Lossless Audio Codec uncompressed is the most left position.
- Push OK button.
Settings: uncompressed FLAC
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 for faster metadata saving without full file re-writing.
Unpacked binary audio content doesn't depend on converting tool and compression level.
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AuI ConverteR has several price/functionality options that allow saving your budget for the required functionality. You can expand Modula-R abilities later by purchasing new modules. Unlimited-time license, major updates (... 10.x > 11.x > 12.x > ... versions) are paid.
WARNING: Modula-R modules (parts of AuI ConverteR’s functionality) are NOT compatible with Free version.
ADD-ON modules work with certain CORE modules only (see details).
The module is license key received in order email. To activate module functionality, enter its key in Modula-R executable.
All "Modula-R" modules together have "PROduce-RD"'s abilities.
Full-featured "PROduce-RD" version is like a discount on price of full module kit of "Modula-R" version.
To expand functionality, module(s) (compatible with purchased major version number) may be ordered separately.
Modula-R license cannot be replaced with PROduce-RD.
* All prices on this page are in 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.
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Frequently Asked Questions
Is FLAC uncompressed? Is FLAC compressed? Can FLAC be uncompressed? Is FLAC compressed or uncompressed?
FLAC use file size compression. The compression has several levels. Also, in some applications, FLAC may be uncompressed.
FLAC level may be understood as compression level. It defines the balance between the compression speed of a source file to .flac and the FLAC-file size. Compression level doesn't impact sound quality.
When you convert Free Lossless Audio Codec, you may stumbled on question: what level of FLAC compression is the best? The levels define the ratio between FLAC-file 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).
For sound quality no difference. The author supposes, FLAC has wider metadata compatibility with a device and software, than WAV. And FLAC has a lesser file size. However, sample rate and bit depth of FLAC is limited 32 bit / 384 kHz. Read more...
Both FLAC and AIFF are the same for audio quality. Looks like, FLAC has metadata compatibility for a wider device and software ranges, comparing AIFF. FLAC advantage is the lesser size of computer files. FLAC has limitations in sample rate and bit depth: 32 bit and 384 kHz. Read more...
No. FLAC fully keeps original audio data. FLAC is a true-lossless sound format.
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.
FLAC is true lossless always independent of the level of compression, including the uncompressed one. Read more and watch video...
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 the uncompressed option. Read more and watch video...
FLAC supports bit depths 16-, 24-, 32-bit by user option and audio software abilities.
The compression rate of FLAC is [compressed FLAC size, bytes] / [source uncompressed file size, bytes] ratio.
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.
So, technically, FLAC is better in sound quality. But, lossy formats allow saving free disk space.
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- What is FLAC
- FLAC to ALAC
- FLAC TO MP3
- FLAC CUE Splitter
- ISO to FLAC
- DSF to FLAC
- DFF to FLAC
- FLAC 32 bit
- Audio converters
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