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How to normalize FLAC files? Mp4Gain is the solution.

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How to normalize FLAC files? Mp4Gain is the solution.

Normalize FLAC

For years, Mp4Gain has been able to serve to normalize the loudness of the most popular audio formats such as Ogg, FLAC, ACC, Mp3, etc and also video such as mp4, avi, flv, mpeg, etc. has received a lot of attention.

Initially it was the normalization of the audio volume level of mp3s, but later we have been able to achieve with great success and great quality to normalize the loudness of all these other audio and video formats.

How to normalize FLAC?

The operation is simple: you just have to load your audio or video files and press the button to normalize your audio volume level and that’s it. In no time you will have the file perfectly normalized.

At the same time you can perform other functions, such as equalizing the sound. and improve the sound quality, modify the bitrate, the samplerate and modify the pitch without affecting the speed or vice versa, modify the speed without affecting the pitch.

How to normalize FLAC files using Mp4Gain?

The easiest way to normalize FLAC files or to convert (and normalize at the same time) mp4 videos or directly convert mp3 to FLAC is to use Mp4Gain, which is as simple as loading the mp3 or an mp4 and clicking on the video and that’s it. you can convert from mp4 to FLAC or from mp3 to FLAC, all with the best sound quality and with the volume perfectly normalized.

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WAV has no better sound quality than FLAC

WAV has no better sound quality than FLAC.

FLAC vs WAV

The switch to file playback invites unnecessary discussion.

FLAC y WAV

In recent years, audio equipment has expanded into the field of file playback, which has been handled by personal computers, and most of the players currently on the market are equipped with a USB terminal and a LAN terminal, and they are compatible with various audio formats. .

Network audio PC audio file format Sound quality difference FLAC WAV JPLAY

It can be roughly divided into four formats.

Lossy compressed audio formats, such as mp3 and AAC
Lossless compressed audio formats such as FLAC and ALAC
High quality WAV format equal to or better than a CD sound source
Audio formats other than CD (such as DSD)
If you enjoy music with PC audio or network audio, it is a common understanding that the sound of lossy compressed audio format is worse than that of a CD.

In theory, lossy compressed audio formats lose information during the compression process and cannot be restored to the original WAV file, so if you want to make up for the difference, you can increase or interpolate the information. There is no choice but to “fill in”. Even so, the amount of information is not the same, and since we are interpolating what is not there, although it sounds good, it is only an imitation.

I think the argument that there is a difference in sound quality when there is a difference in the amount of information theoretically was also at the time of the transition from pre-records to CDs and the emergence of SACD and DVD-Audio. The difference in the amount of information is the difference in sound quality, which can be said to be the same when comparing high-resolution and CD-equivalent sound sources. It is true in a sense, although it is conditional on the material at the time of production being good.

Discussion of lossless compression formats
On the other hand, as a story to debate among people who enjoy PC audio and network audio, there is a similar story between WAV files equivalent to CD sound sources and FLAC files in lossless compression audio format.

WAV sounds better than FLAC.
Sound is better without tag information.
So make all sound sources WAV and remove all tags.
No, it’s inconvenient without a label, so commit to FLAC
Certainly, the sound output between FLAC files and WAV files may sound different if you play it back on a PC or network audio player. Even at home, when I play it on the Marantz NA-11S1, I feel a slight difference.

Network audio PC audio file format Sound quality difference FLAC WAV JPLAY

However, WAV files, FLAC files, and the CD sound source used as the extraction source are originally sound sources with the same amount of information, unlike the lossy compressed audio format. Which is better, when playing on a CD or when playing a WAV file, or when the sound source is the same?

The answer is fixed.

It depends on the quality of the player.

If you are good at playing CDs, you will hear them better. If you’re good at playing WAV files, WAV files should sound better. Since it is related to the creator’s commitment, I think the sound quality may not be exactly the same depending on the playback path and the processing method.

Similarly, FLAC has the same amount of information, so there should be no difference in sound quality. But it certainly sounds different. I think it should be the same.

Let’s change our perspective and look at the lossless compressed file format, which is not an audio file.

WAV vs FLAC – Comparision

Why WAV and FLAC make fun of saying “the quality of the sound is different”?

WAV vs FLAC

By observing the area of audio files (audiophiles), sound quality is different between WAV and FLAC!

FLAC versus WAV File Format

There are people who scream. In this article I would like to consider if it is true.

Differences between
WAV (Wave) is a file format that can store linear PCM, and FLAC is a format that can store audio with compression without loss (ie, it can be compressed without loss of sound quality).
According to the FLAC standard, formats of up to an integer of 32 bits / 655,350 Hz can be stored, but the encoder itself supports an integer up to 24 bits.
WAV is a former standard created in 1991 and is actually a type of container standard called Riff. Several waveform data can be saved in WAV, and 64-bit floating, etc. can also be stored.
In other words, if both are in the range of 24 bits, you can save exactly the same waveform. This is a perfect combination at the waveform level.
If you are using a music player called FOOBAR2000, you can use a supplement called Binary Share to confirm that there is no difference of 1 bit between WAV and FLAC.
FLAC has a CRC checking sum for each frame and the file has an MD5 hash to detect damage to the file. It is possible that WAV does not realize even if it is damaged, as confusing data.
By the way, if you want to save 32 bits or more, you can use a lossless compression format named Wavpack.
“Decodify load gar”
The logic of those who argue that there is a difference in sound quality between WAV and FLAC is generally “FLAC requires decoding to PCM for reproduction, and there is a need for decoding, so the CPU load is high and quality of sound is high. It gets worse. ”
The first half of this logic is correct. FLAC is a compression without loss and must be decoded for reproduction. However, when discussing the second half, questions arise.
Although FLAC is a compressed format first, the load during decoding is one of the lowest among all lossless compressed audio formats.
The codecperformancecomparison site has decoding speeds by format. Among them, FLAC has a speed that far exceeds Monkey’s Audio, Wavpack, AAC and MP3. The decoding speed is almost the same regardless of whether the compression rate is 5 or 8.
It is said that FLAC can decode only by arithmetic of integers (source), and is quite fast. Although WAV does not require decoding, it is nothing more than using the CPU, since reading the file, saves it in memory and the CPU processes the driver and sends the data to the sound card.
In addition, WAV is not compressed, so there is the problem that the file size increases. This means that reading files from storage is clearly more frequent than FLAC. This is nothing more than using more bandwidth of your computer bus. How do you explain the electromagnetic noise that generate these storage and buses? Has anyone verified it?
Importance of the ABX test (double blind test)
I think most people in audio files (OTA, audiophiles) minimize science and think about things with several conjectures, relying solely on their own senses.
“Clear sound” “Soft and elegant acutes” “Natural Low”
These words sound good, but they have to do with falsifier and I can not even start a discussion.
I want to compare A and B. At that time, the “ABX test” or double-blind test (double blind method) is useful.
Let’s say you have A and B. I want to compare A and B. It can be WAV and FLAC, or an oxygen-free copper cable and Amazon Basics cable. It may be the sound reproduced by the electricity generated by hydroelectric power and the sound reproduced by sunlight, or the difference between iPod and Walkman, cassette tape and disk.
If you really want to make a comparison, hide A and B and ask. There is another collaborator in this. When you start the test, the collaborators first prepare the equipment for A and B, and they clearly touch each sound as A or B. Next, the collaborator hides A or B and reproduces the sound. It can be in the order of Aabbaba or Ababab. Anyway, he plays randomly. And the collaborator asks: “What was the random sound I presented for the first time, A or B?” He can request and re-listen to the sounds A and B at any time during the test.

What is a “FLAC file”? Part 2

What is a “FLAC file”? Part 2

FLAC

He appeared there, compression without losses.

FLAC format file

Humans are greedy creatures.
While recognizing the excellent technology of MP3, if you still want to return to the original Wave file, you want to compress it in a format that can be reversed exactly.
Unlined compression is a compression method that allows you to return to the original form if you wish, even if it compresses it.
Unfortunately, MP3s have an “irreversible” cross, so they can not play that role.

Here comes the “compressed file without loss” for music as “FLAC file”. There are other formats for “compression without loss” files such as “Apel Archive”, “WMA Lossless” and “Apple Lossless”, but from my point of view, the “FLAC file” seems to be the most widespread.

This “FLAC file” is much less popular than the “MP3 file”.
However, if you want to reverse a “FLAC file” to a “Wave file”, you can revert to the original “Wave” exactly without a 1-bit error.

Oh, you might think that a good file format could be more popular.
I also believe it.
But everything in the world is barter. Not all are satisfied unilaterally. If you get one, you must sacrifice one.

The “lossless compressed files” represented by “FLAC files” are sacrificed to obtain the wonderful property of “non-loss compression”.

That is the “compression rate”.

“MP3” compressed the original “Wave” file at 1/10, but the “FLAC file” is limited to the maximum compression.
In other words, in the case of “MP3 file”, a small element of about 5 minutes compressed to “5MB”, and even in a 1 hour box office success symphony, but in the case of “Flac File”, a small element of about 5 minutes. A symphony of box office of an hour of “25 MB” can only be compressed at about “300 MB”.

This is really subtle.
Probably “NG” in the era of telephone lines through modems.
However, in the ADSL era, this also reached the level of “Is there one?”
And when the optical lines are generalized, it is probably “yes”.

With current optical lines, you should be able to download “FLAC files” more comfortably than downloading MP3 files in the telephone line era.
In other words, the low “compression rate” that was sacrificed to perform a “compression without losses” is not necessarily a “sacrifice” due to the generalization of the optical lines. In that case, the mainstream of music files on the Internet can be replaced with “loss compression files” represented by “MP3 files” to “FLAC files” of “non-loss compression”.

The establishment of the “FLAC file database” this time was due to I wanted to lead that trend.

Basically, download and then decodify a wave file

So, how is the downloaded “FLAC file” played? Unfortunately, it can not be reproduced with important software as “iTunes” and “WMP”.
At the moment, the “FLAC files” can be reproduced without problems.

However, I do not recommend playing “FLAC files” as they are.
The greatest merit of the “FLAC file” is “reversibility”. Then, the way to take full advantage of merit is to decode the “FLAC file”, restore it to the original “Wave” file and then play it.

The increase in capacity and reduction in the price of hard drives are also a wind in favor of this trend.
In addition, even those that have not yet entered the Audio of the PC can record a “Wave file” on a CD and play it on a CD player. Since it is a “lossless compression” without deterioration of sound quality, the quality of CD created in this way is exactly the same as that of the market.

Well, how are you?
If you have read up here and are interested in “FLAC files”, go to “FLAC file database” and download it.

Next time, I will explain how to decode a “FLAC file” and restore it to “Wave File” as a first step to use the “FLAC file”.

What is a “FLAC file”?

What is a “FLAC file”?

FLAC

Introduction to FLAC.

Free Lossless Audio Codec FLAC

The base of the music files are the “Wave files”. If you draw a music file from a commercially available CD, it will be saved in this “Wave file” format. Therefore, this “Wave file” is the best in terms of sound quality.

However, the inconvenience is that the file size is very large.
Generally, “1 minute = 10 MB”, so even a small element of about 5 minutes will be “50 MB”, and a 1 hour masterpiece symphony will be “600 MB”.
When I try to download such a large file on a thin line in the first days of the Internet, it does not end, even if it takes hours (days?). (It is still difficult for “600MB” files ^^;)
Even so, the desire to share music widely through the Internet created a compression technology called “MP3 files”.

I will omit a difficult explanation, but the good thing about this “MP3 file” was that “reduced the deterioration of sound quality as much as possible” and “reduced the size of the file”. Now, even if the file size is reduced to 1/10, you can enjoy music with a sound quality that is not very different from that of a CD.
In other words, even if the file size is reduced to “5MB” for a small element of approximately 5 minutes, or “60MB” for a 1 hour box office success symphony, you can now enjoy music with a quality of Sound that is not very different from that of a CD.

It’s really great.

However, there is a difference in sound quality when compared to the grave.
With the growing interest in PC audio these days, more and more people pay attention to this sound quality. For those who say that, it is “natural” reproduce music in “Wave files” instead of “MP3 files”. In fact, due to the pc audio boom, the software that can only be played Wave files is appearing one after another. “CMP2 = CMP + CPLAY” and “WAVE FILE PLAYER” are typical examples, and high-quality sound playback that distinguishes it from conventional playback software is on sale.

Well, I do not care … if you say it, pass this page. (^^;

Weaknesses of MP3 files → irreversible

MP3 files are a really good technology. By compressing the size of the file to 1/10, it maintains an excellent sound quality so that you will not notice the difference with the original “Wave file” if you listened vaguely. Then, as I mentioned earlier as a joke, it is not surprising that some people say: “That is enough for the quality of the sound!”
It is such a good technology.

However, these “MP3 files” also have a fatal weakness.
That is “irreversible”.

It is difficult to say “irreversible”, but the point is that once a “Wave file” is compressed in an “MP3 file” and it becomes, you can not restore the original “Wave” file. It is about nature.
This “never return” property is called “compression with loss”, and compression with said property is called “compression with loss”.

However, you may be told: “If you decode the MP3 file, it will return to the Wave file!”
Usually, the conversion of the original file into a compressed file is called “encoding” and, in reverse, the conversion of the compressed file to the original file is called “decoding”. · · · Trivia (^^ V
Certainly, MP3 files can be converted to WAVE files using the appropriate software.

However, keep in mind that the “Wave file” created when decoding the “MP3 file” is not the same as the original “Wave” file. This is because the deterioration of sound quality caused by the first compression is not recovered and becomes a WAVE file in a deteriorated state.
Specifically, the “MP3 files” eliminate the high tone information that is difficult to listen for the human ear in the compression process. Therefore, even if you decode the “MP3 file” compressed in this way, high-frequency cut information will not be recovered.
Therefore, if you do something stupid as Wave-> MP3-> Wave-> MP3-> Wave …, the sound quality will deteriorate and you will end up in a “is not what you heard”.

What is High Resolution Audio (HRA)?

What is High Resolution Audio (HRA)?

In most digital audio systems, the analog signal (that is, the sound we hear) is converted into a digital signal for storage and transmission using a pulse code modulation (PCM) system.

High-Resolution Audio

The quality of a digital recording is determined by two factors: the bit depth and the sampling frequency. Bit depth determines the number of “steps” we have to describe the sound: the higher the bit depth, the wider the dynamic range of the recording, that is, the difference between the loudest and lowest sounds.

“At the same time, the higher the sample rate, that is, how many times per second a snapshot of the analog audio signal is taken, the more accurately the audio can be analyzed and converted to digital format. That is, the range of sound from low to high. ”

The higher the bit depth and sampling frequency, the more information can be recorded.

Image “SAMPLING FREQUENCY – NUMBER OF” SOUND SNAPPIES “PER SECOND”
CDs use 16-bit / 44.1 kHz encoding. When the CD format appeared in the early 1980s, it had wonderful quality, but now we can record and stream music with even higher bit depths and sample rates in formats that have been used in music studios and mixing for many years. years. Now music in these formats is available to every home.

What is High Resolution Audio (HRA)? Beginning
Hi-Res Audio: Any format that exceeds standard CD quality (16-bit / 44.1 kHz). High-definition recordings typically use 24-bit encoding, which greatly expands the dynamic range compared to CD. The sample rate for this audio goes up to 192 kHz, which is the standard for high-definition commercial recordings. The goal of the new formats is to provide sound quality as close to the studio as possible.

Hi-Res Audio Formats
There are many High Resolution Audio (HRA) formats, and your player should be able to handle as many as possible. Technics devices work with all major HRA formats (including some less common ones), making it easy and playable even in the future when the market changes.

Music in CD quality is also available for most formats. Below is a list of some of the common formats that are used for both lossless CD quality music and Hi-Res Audio.

Hi-Res Audio Formats – Principle
FLAC: Studio Mix Quality (24-bit) and CD Quality (16-bit)
Most music files (both in high definition and CD quality) are presented on the Internet in FLAC (Free Lossless Audio Codec) format: free means the format, but not the music itself. 24-bit FLAC files are usually available in 96 or 192 kHz, although some albums are also recorded in 24-bit / 44.1 kHz or 24-bit / 48 kHz. The 24-bit / 192 kHz files are the highest quality recordings to date, identical to the studio master recording.
Unlike the MP3 format, which requires deleting some data to reduce the file size, the FLAC format is lossless and works like a zip file on a computer: decompression happens on the fly, while playing, and the unzipped data is identical to the previous data. compression.
Apple has its own lossless audio format: Apple Lossless (ALAC). Files in this format work in the same way as FLAC, but are compatible with iTunes. Several companies offer downloads of studio master recordings in FLAC and ALAC formats.
Another advantage of the FLAC and ALAC formats is that they store information about the music in metadata, which includes the usual information: artist name, album name, title and track number, genre, composer, catalog number, etc.
This information can be encoded on any studio master recording, on high definition tracks purchased online, or it can be burned onto the CDs you are ripping from – the ripping program searches for the saved disc in an Internet database and automatically fill in all the information. This information can also be edited or entered manually.

What is FLAC?

What is FLAC?

FLAC

FLAC is a lossless format

An exhibition on audio will once again bring together connoisseurs of high-quality sound and this meeting was dedicated to the penetration of new music storage formats in hi-fi and high-end equipment, in particular the most popular lossless. Flac audio compression format. There are several different formats to store digital music without losing quality. In this case, the file type is determined by the type of operating system on which the audio stream is saved. Of these, only the second has become widespread due to the fact that it is almost the only way to listen to high-quality audio from iOS devices.

Many music lovers prefer the FLAC music format.

Everybody loves music. Some listen to it on the way to work, and others can’t go a minute without their favorite songs. Listening to music comfortably depends not only on the mood, the time, the moon phase and good headphones, but also on the audio format in which it is stored on our devices. In the 21st century, streaming services are becoming popular, but most people still store music offline and listen to it from their phones, players, audio systems, etc.

There are many codecs for audio recordings that differ in the transmission quality of the sound, the size of the final audio file, the ease of editing, etc. However, what is common to all audio formats except those of the standard system, for their reproduction, appropriate sets of algorithms are required that perceive a sequence of bits from a file of a specific type – codecs. Where and how to download music in flac format, you will learn from this article. Content of this article:

Even in a home theater, this is not entirely decent. Well, you found out the properties of the file, everything is simple there.

FLAC Free Lossless Audio Codec, a free and fully recoverable audio compression codec, defines not only the encoding format, but also the reference codec implementation. At the end of the decade of the last century, one of the popular formats of music files, MP3, provoked some criticism. But even then, there was a better alternative to playing high-quality music that was gaining popularity. The FLAC format received some attention in connection with the release of PonoPlayer and the corresponding web store, as it provided bit-accurate CD copying, but half the size. Today, the format is compatible with many phones, including the iPhone, after installing a special application, portable players and hi-fi stereo systems. Although the first legal MP3 site was already up and running. The introduction of the iPod annually helped legalize the MP3 format, which has become the most popular in online music stores today.

MP3 is a lossy audio format, which means removing part of the audio spectrum to reduce file size. However, if all you need to do is transcode an audio track from an MP4 video to MP3, then there is little point in using the lossless format. FLAC is a lossless format and resembles a ZIP file in structure; In theory, the sound quality should match the uncompressed original. Who uses MDs now?

Flac format because it’s better

Flac format because it’s better

FLAC

Flac is an audio encoding format that is very good for several reasons first because it is considered a lossless format which means that none of the data in the recording file is compressed or removed when converting it.

WAV vs FLAC

Some people will say Good but there is another lossless format called WAV

But it turns out that this format takes up a lot more space on your hard drive.

The flac format also allows the use of meta tags with meta information such as the album cover, the lyrics of the song, the name of the composer and so on.

Let’s see first what are the benefits of the flac format and the first and most important is that it takes up much less space than any other lossless format. For this reason it is ideal for storing it does not matter how many times it is copied because it keeps the exact information.

There are many people who say and they are right that the average user cannot distinguish a good quality recorded mp3 from a flac format.

This is true because if you do not have a very high quality reproduction equipment and the person does not have an auditory training it is possible that they could not distinguish one from the other.

For this reason, we will recommend that if you really have a good ear, you should buy a good quality Hardware so that it is worth using the flac format and you can really get the advantages and benefits.

What is the FLAC audio format?

What is the FLAC audio format?

Free Lossless Audio Codec - FLAC

To listen to your favorite music in the highest quality, you need two things: the right equipment and the audio format. The recording format indicates the quality. In forums, people often discuss which format is the best. The most popular formats degrade sound quality. In this article, we will guide you about the FLAC audio format.

FLAC

Characteristics of the FLAC audio format.

FLAC is a free lossless audio codec. This stands for the abbreviation Free Lossless Audio Codec. The codec reduces file size by 50% compared to a similar quality audio CD.

The FLAC format is compatible with many smartphone applications and portable audio players.

Another feature of the FLAC codec is that it is free and distributed under the GNU GPL. This means that any audio maker or music publisher can use it for free.

How is FLAC different from lossy compression formats?

Other audio codecs compress lossy files (MP3, AAC, WMA, Ogg Vorbis, Opus). FLAC does not remove any information from the audio stream. It is suitable for listening to music on high-quality equipment and for archiving your music collection.

Lossy codecs, such as MP3, simplify the signal to reduce file sizes. That is, some data that the codec considers less significant and barely audible is erased. As a result, music loses detail, sound becomes drier and thinner at high frequencies. Consequently, the audio signal is roughly the same as in the photo, which was first compressed from 8 to 2 megapixels and then stretched to 8 megapixels. Despite returning to the original size, the original clarity of the image will no longer be.

Lossy compression in the example of a photograph.

The FLAC format works differently. It does not change the audio stream. AudioCD music is recorded similarly, but FLAC compresses the track to reduce its size in megabytes. For compression, the same principles are used as for creating RAR or ZIP archives. In other words, in the digital recording itself there are patterns that are recorded in a simplified way, but that can be restored to their original form by decompressing them.

The FLAC compression algorithm, unlike ZIP algorithms, divides the file into small blocks, several kilobytes in size. For each of the blocks, the optimal compression formula is selected, so if an audio CD (700MB) is simply archived in ZIP, it will take 550-650MB, and in FLAC, you can achieve a reduction to 350- 500 MB. At the same time, the signal quality does not deteriorate.

What smartphones are FLAC compatible?

Support for music in the FLAC codec is almost on any modern smartphone.

Current microcircuits of the middle class are equipped with a fairly advanced built-in codec. It is capable of playing high definition Loseless music up to 192 kHz. Such solutions allow to remove the load from the central processor, reducing battery consumption, but a weak sound path can impose restrictions on the sound quality at the output.

Best of all, smartphones with a discrete decoder and DAC, made separately from the chipset, can play music in FLAC format. These include the iPhone, Samsung Galaxy A, S and Note series, LG G and V series, Sony Xperia. Also, a discrete DAC that provides effective decoding of the FLAC codec is found in many BBK devices (Oppo, Vivo and OnePlus), LeEco, Meizu flagships.

FLAC [Free Lossless Audio Codec] The difference between FLAC and mp3

FLAC [Free Lossless Audio Codec] The difference between FLAC and mp3

FLAC (Free Lossless Audio Codec) is a lossless method for compressing the size of digital music information. Read about comparing mp3 and FLAC and then open it.
The file with the * .flac extension can store music compressed using the free lossless audio codec, as well as high-resolution DSD DoP or MQA formats.

Flac

“Lossless” means that “the original and restored digital audio material is completely identical.”

Example:

If the sequence “1234” is compressed in size in a certain sequence (for example, “97”), after unpacking the latter we have again “1234”.

Read on to learn more about audio quality, conversion, playback, and more.

Features> Converters> FLAC sound quality problems> How to play FLAC (software players)> Download FLAC files (examples)> Links> FLAC and iTunes> FLAC or mp3>

In addition to Free Lossless Audio Codec software decoders, there are hardware decoders built into portable audio players (DAPs). Although in reality a DAP or a mobile phone is a small computer that runs a program to encode or decode a music format.

A single large * .flac file can be a music album container along with a CUE index file containing the start time points of each track.

The free lossless audio codec is maintained by the Xiph.Org Foundation.

The open source software libraries at the time of writing are available for Windows, Unix (Linux, * BSD, Solaris, Mac OS X, IRIX), BeOS, OS / 2, Amiga operating systems.

FLAC features

Sampling frequency: up to 384 kHz
Bit resolution: up to 32 bits
Compression type: lossless
Audio compression: compressed / uncompressed (uncompressed, non-standard)
FLAC file size compression ratio / compression ratio: 9 levels
(As a first approximation, the compressed FLAC size is approximately 60% of the original WAV size or more)
Using the FLAC file as a container for other formats – yes
Preservation of text metadata: yes
Save artwork as album art: yes
Save multiple images – yes
Program code: open source

FLAC sound quality problems

Compressed vs uncompressed
One of the most popular and never ending discussions is “FLAC vs WAV Sound Quality”. There is an opinion that WAV sounds better than FLAC.

However, WAV has compatibility issues with displaying metadata with some software. Therefore, uncompressed FLAC was implemented, which supports metadata as standard.

FLAC and WAV contain the exact same digital material. Therefore, FLAC and WAV should sound exactly the same.