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Optimize music files
to reach your device’s sound quality limit,
get compatible audio format or save disk space.
accurate audio file converter software for
music production and discerning music lovers
FLAC, WAV, AIFF, ALAC, SACD ISO, DSF, DFF, mp3, m4a, CD...
We think about quality. You just work with music.
If you buy "AuI ConverteR PROduce-RD" (2023/12.x version) from 24 August 2023 to 24 October 2023, you will get free update to version 2024 (13.x) after its release.
Audio Basis - articles about audio
"Lossless" means "original and compressed audio contents are binary identical completely".
Read how to open FLAC files, convert, playback, what sound quality.
- FLAC specification
- Sound quality of FLAC
- FLAC resampling
- FLAC converters
- How to play FLAC files
- FLAC file and iTunes
- FLAC or mp3
- FLAC or WAV
- Free FLAC file downloads
- Read more
- Additional information
- Frequently Asked Questions
To store continuous albums, a single big *.flac file may be used with CUE index file, that point to each track's beginings.
Free Lossless Audio Codec is supported by Xiph.Org Foundation.
Open-source programming library of the codec is available under Windows, Unix family (Linux, *BSD, Solaris, Mac OS X, IRIX), BeOS, OS/2, Amiga.
Also, FLAC codec has hardware implementations.
- Sample rate - up to 384 kHz
- Bit depth - up to 32 bit
- Channels - 1 to 8
- Compression kind - lossless
- Compression - compressed/uncompressed (non-standard)
- FLAC file size compression/packing speed ratio - 9 levels
(approximately, target FLAC size is 60% of original WAV and more)
- Using as format container - yes
- Text metadata support - yes
- Artwork metadata support - yes
- Storing several artworks in a single music file - yes
- Programming code - open-source
One of the infinite discussions is "Sound quality FLAC vs. WAV". There is an opinion that WAV sounds better than FLAC.
Even FLAC uncompressed was released.
FLAC and WAV have identical binary musical content. Thus, FLAC sound is absolutely identical to WAV.
In the video, we can see, how to compare FLAC and WAV musical content. Main question: how FLAC and WAV can sound differently when both ones contain absolutely identical digital stream? It's a software "bug"?
There is a hypothesys that FLAC decoding increases CPU calculating intensity. And, more intensive electromagnetic radiation with wire noise impact to analog part of DAC more significantly. It increases noise level at the analog output. However, for modern computers, FLAC decompression is not too big load.
The author doesn't see researches, where noise levels are compared for playback FLAC and WAV with similar binary audio content.
- AuI ConverteR 48x44 (Win, Mac)
- XLD (Mac)
- Foobar 2000 (Win)
- How to Convert ISO to FLAC under Mac and Windows [User Guide] >
- DSF to FLAC Converter [with User Guide] >
- FLAC to DSF Converter [with User Guide] >
- FLAC CUE Splitter >
- FLAC Uncompressed Converter >
- Foobar 2000 (Win)
- VOX (Mac)
- AIMP (Win)
See more audio players...
FLAC file is iTunes incompatible. However, FLAC can be converted to AIFF with keeping metadata (including artwork).
As example, if you use FLAC file converter AuI ConverteR, into its Settings > Metadata > check Compatibility metatags with iTunes switch.
FLAC is a lossless format. MP3 is lossy.
MP3 may have different levels of compression. It is not obligatorily, that you distinguish the sound difference between FLAC and MP3.
If you don't hear the difference now, simply keep original lossless FLACs, WAVs or other. Maybe in other equipment, you get the sound difference. Or new compressing format appears to achieve lesser size with keeping quality, as example.
Both FLAC and WAV are lossless audio formats.
The main FLAC advantages are:
- lesser size;
- better metadata compatibility with software and devices.
In instance, sometimes audio players don't display song name, performer, genre and others that are embedded into WAV files.
However, WAV supports sampling rates above 384 kHz and bit depths in float point format and above 32 bit.
Read discussion about sound quality here...
FLAC audio sample download:
- FLAC to ALAC
- FLAC TO MP3
- FLAC CUE Splitter
- ISO to FLAC
- DSF to FLAC
- DFF to FLAC
- FLAC 32 bit
- Uncompressed FLAC
- Audio converters
- DFF File Format Audio. DFF File Extension >
- DSF File Format Audio. DSF File Extension >
- Audio converter >
- ISO converter [1-bit audio] >
- CD ripper audio >
- Metadata editor >
- Tutorials >
- Educational Audio Basis program >
FLAC is a lossless audio format. So, it is one of the formats that provide the best sound quality.
mp3 is a lossy sound file format. FLAC is a lossless one. Technically, FLAC is better.
FLAC and WAV provide lossless sound quality. They are identical in the first approach.
Read the guide on how you can split FLAC file with CUE splitter...
You can extract audio data from big sound file by .cue file according to the manual...
You can convert CUE files with audio file to mp3 according to the guide...
To convert mp3 to DSD read this manual...
You can trim FLAC files on Mac via an audio editor like Audacity or other.