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Audio files, which is better?

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Audio files, which is better?

There are various types of audio files on the market today, and even though we are all familiar with MP3, what about AAC, FLAC, OGG or WMA?

Why are there so many audio standards? Is there a better audio format? Which ones are important and which ones can be ignored? This is pretty straightforward once you realize that all audio formats fall into three broad categories. If you know what the categories mean, you can choose the format within the categories that best suits your needs. Today 2T will take you familiar with ten common audio file formats.

uncompressed audio format
Uncompressed audio consists of actual sound waves that have been captured and converted to a digital format without any additional processing. So uncompressed audio files tend to be the most accurate, but they take up a lot of disk space, around 34MB per minute for 24-bit 96KHz stereo.

Audio File Format: PCM

PCM stands for pulse code modulation, a digital representation of the original analog audio signal. Analog sounds exist as waveforms. To convert a waveform to digital bits, the sound must be sampled and recorded at specific intervals (or pulses).

This digital audio format has a “sample rate” (how often the samples are taken) and a “bit depth” (how many bits are used to represent each sample). There is no compression involved. A digital recording is an almost exact representation of an analog sound.

PCM is the most widely used audio format on CDs and DVDs. There is a subtype of PCM called linear pulse code modulation, where samples are taken at linear intervals. LPCM is the most common form of PCM, which is why the two terms are pretty much interchangeable at this point.

Audio File Format: WAV

WAV stands for Waveform Audio File Format (also known as Windows Audio at some point). This is a standard established in 1991 by Microsoft and IBM.

Many people think that all WAV files are uncompressed audio files, but this is not the case. WAV is a Windows container for different audio formats. This means that WAV files can contain compressed audio, but they are rarely used for this purpose.

Most WAV files contain uncompressed audio in the PCM format. WAV files are simply wrappers around the PCM encoding to make them more suitable for use on Windows systems. However, Mac systems can usually open WAV files without any problem.

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FLAC audio format

Analyzing the difference edit transmission
FLAC is different from MP3.

MP3 is a lossy audio compression code, but FLAC is lossless compression, which means that the audio will not lose any information after being compressed with the FLAC code. After restoring the FLAC file to a WAV file, the content of the WAV file before compression itself. This compression is similar to ZIP, but the compression rate of FLAC is higher than ZIP and RAR, because FLAC is a compression method specially designed for PCM audio characteristics. And you can use the player to play FLAC compressed files directly, just like you usually play MP3 files (there are already many FLAC-compatible car players and home audio equipment, and you can find links to these equipment manufacturers on the website of FLAC).
FLAC
FLAC
FLAC is free and is compatible with most operating systems, including Windows, systems built on Unix-like kernels ( Linux , BSD , Solaris, IRIX, AIX, etc.), BeOS, OS/2, Amiga. And FLAC provides a compilation system in autotools, MSVC, Watcom C and Project Builder development tools.
Now all the major websites have FLAC music downloads, publishers usually take the .
Lossless format combined with good headphone effect is very good.
projectedit transmission
Streaming format FLAC
Reference encoders and decoders provided as libraries;
flac, a command line program that can encode and decode FLAC files;
metaflac, a metadata editor for FLAC files that works from the command line.
FLAC input plugin for different audio players
FLAC
FLAC
When we say “FLAC is free” we don’t just mean that you can get it for free. More importantly, the FLAC file format is completely open to the public and you can use it for any purpose (FLAC project only reserves the right to maintain the FLAC format specification and confirm compatibility features), the FLAC file format, and the encoding/decoding implementation. They are not subject to any known patents. Also, all source code is available under an open source license.
Development history edit stream
The FLAC project was started in 2000 by Josh Coalson. The FLAC bitstream format was frozen when it entered beta phase and when reference implementation version 0.5 was released on January 15, 2001.
In June 2001, FLAC released version 1.0.
FLAC

On January 29, 2003, the “Xiph. Org” foundation and the FLAC project announced that FLAC has become an independent company banner under “Xiph. Org”. In addition, “Xiph. Org” also provides support for many free compression formats. Like Vorbis, Theora, Speex, etc.
On September 17, 2007, FLAC released version 1.2.1.
June 1, 2013 First update in six years, from v1.2 to v1.3. Major changes include: support for RF64 and Wave64 formats, support for ReplayGain for audio sample rates up to 192 kHz, and more.

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.

Are there sound differences between WAV and FLAC?

What format is the best? Two fundamental opinions have prevailed over WAV and FLAC. The audio test reveals whether the perceived sound differences between theoretically identical music files are correct.

FLAC

The music file on the hard disk consists of several components that are in a “package”. In addition to the actual music data, the container contains information about the format, resolution, and album information (metadata).

In the WAV container format, PCM (CD) data is saved uncompressed and lossless. FLAC saves the data in a way that saves more space. This is known as lossless compression. The two basic views of FLAC / WAV are:

The FLAC and WAV containers have identical data registers, and therefore sound absolutely the same, based on a technical abstraction (bits are bits).

WAV sounds clearly better than FLAC based on subjective listening experience.

Who has the reason

The two basic questions are:

Is the music data in the two WAV / FLAC containers identical?

Does the playback of the data, which includes the FLAC unpacking process, produce sound relevant errors?

For the comparison to be meaningful, the two files must come from the same source or have gone through the same extraction process.

FLAC offers different compression rates from 0 = no compression to 9 = high compression and smaller file size. The standard value is 5 and offers a medium level of compression and a reduction in file size of about 45 percent. The FLAC encode-decode process is asymmetric, that is, the computational effort to encode (once) is greater than to decode (multiple times / playback).

An extraction program uses the checksum to check if the data was extracted without errors. Good to know: encoding the data and filling the container with audio and metadata only takes place after the extraction process has completed. This means that the extraction process in the first stage is always the same, regardless of the container format to which the data is transferred in the second stage. Also, metadata and audio data are not nested with each other. Each item has its own storage area in the container.

How can the files be compared to each other?

Two teams of exactly the same force in a tug-of-war competition do not move from the venue, as 180 degrees opposite, equally large forces cancel out. In audio technology, exactly this principle is used to compare audio signals. With the call set to zero, the two audio signals to be tested are added, that is, they are mixed. Before mixing, one of the two is reversed (mirrored). A previously positive half wave is now negative and the negative half wave is correspondingly positive.

If there is no difference between the WAV and FLAC data, the result after mixing should be a zero, graphically a straight line (the two files are added to one file). If the musical data is not absolutely identical, then the graph shows a wavy line (the difference in level between the two signals). If the level of the inverted WAV signal is reduced by 0.1 dB, the two audio signals are no longer identical. The waveform remains unchanged, but there is a level difference that must be recognized as a difference signal when zeroing.

conclusion

The FLAC process does not change the binary data in any way. FLAC and WAV audio data are identical, the compression process is bit accurate. If small differences can be heard in a system, processing errors occur during runtime (primarily, the process computer generates errors on the time axis due to additional computational effort). In other words: the system produces the hearing difference. Just like a CD, played on two different systems, it can sound different.

Lossless music: where do you find content?

With MP3 a few more years away, there’s no doubt that it will increasingly be abandoned in favor of lossless or, in the Molière language, lossless formats. At a time when even the iPhone is becoming FLAC compatible, let’s see how it is maintained by default and where to find content.

MP3 is a big step back in terms of audio quality. The success is mainly due to its practicality, as it took up little space on our thin hard drives and portable players (something that sometimes looked like a smartphone but was only used for music!). easily traded on a very slow website.

The format has evolved over the years, increasing the bit rate previously limited to 128 kbps to 320 kbps. Compression still overwrites the details of the sound and increasing the bit rate increases the file size, but the rendering is “almost satisfactory”.

Therefore, MP3 and other compression formats (AAC, Ogg Vorbis, etc.) are not the absolute evil, but lag behind CD quality.

Compared to them, FLAC and ALAC, among others, offer compressed lossless playback. Music files are 3-5 times larger than MP3, but offer minimal CD quality (16 bit, 44.1 kHz). Better yet, they are capable of playing high-resolution music (see our high-resolution article), the encoding of which is traditionally 24-bit / 96 kHz or even 192 kHz. At a time when Internet speed and storage are less of a concern, losses are bound to gain the upper hand and make the good news easier to find.

Walkman compatible with high-resolution files includes a DAC. They are a great way to have an audiophile player at home and on the go.

Lossless purchase and streaming

The non-exhaustive list below will lead you to certain platforms where you can drink without loss. Do not hesitate to tell us your good plans, we will integrate them into the article!

Quobuz: One of the ardent pioneers and advocates of high-resolution lossless formats is the French site Quobuz. Offers the purchase of FLAC files on CD or in high resolution. Subscribing to your entire catalog on FLAC 16bits / 44.1 kHz equates to $ 19.99 per month.

7digital: from CD-quality FLAC with 24-bit high resolution via MP3 at 320 kbps; 7digital offers the format option in its impressive catalog. No subscription, just buy, but on top.

Tidal: This streaming site is the answer of the artists on Spotify and Deezer. More concerned about the rendering because titles are encoded lossless, it pays the authors more. FLAC’s CD quality subscription formula is € 19.99, but the site is also starting to offer 24-bit transmission on 44.1 or 48 kHz thanks to an encoding format called MQA (Master Quality Authenticated) that can be encapsulated in a FLAC file .

Spotify and Deezer: The two music streaming giants are gradually switching to lossless music. A CD-quality Spotify Hi-Fi offer (16-bit / 44.1 kHz) instead of the 320 kbps Vorbis codec is being tested with some privileged subscribers. There is no official announcement or award yet, but it is only a matter of time. Deezer, for its part, offers a Hi-Fi formula with CD quality as part of a partnership with Sonos.

Homemade: FLAC is so emerging that we almost forget the obvious. And if we want to get files as CD, we start … buying the CD! Sometimes they are cheaper than their dematerialized equivalent. Then you can convert with software like CDex, Foobar 2000, Exact Audio Copy, etc.

Many other more specialized sites sell high resolution music: Super HiRez, HDtracks, ProStudioMasters. Some are not even concerned with compression, they offer record masters digital masters. A way to get closer to the artist’s intentions!

The equipment to enjoy lossless music.

The public is increasingly moving towards audiophile products.
Anywhere, iOS 11 or Android smartphones can decode a FLAC file. Some present their sound quality as the Honor 9, the Meizu Pro 6 Plus, the HTC U11, but in order to restore the sound scale and naturalness, it is recommended to use an analog converter.

The DAC, both portable and integrated into your stereo system, reproduces the sound spectrum better. More faithful, better defined, refines the spaciousness and richness of the details of each instrument.

These DACs, as they are called, come in a variety of sizes. Some are mobile phones, such as Audioquest’s DragonFly, which can be connected to a mobile (using an adapter) or a computer.

What are Flac files?

For some time now, people have been hearing about Flac files. But what are these ghost files and what are they for? If you read the following, you will have a clearer idea and the basis to delve into the matter.

Music, especially for the needs of broadcasting through the Internet, has been subjected to compressions, sometimes even violent, with specific algorithms, of which the best known and most used is MP3. This compression is capable of dramatically reducing the size of the part and unfortunately also counteracts the quality, while ensuring an acceptable quality reproduction. This sound treatment is called “lossy”, that is, with loss of information compared to the original.

waveform mp3 and flac

The search for the quality of listening shocks with this treatment ensures that you can store large amounts of musical pieces in small spaces, but at the same time makes listening less “exciting” and mortifies the commitment of musicians and sound engineers. So what can we do to have listening quality, easy storage and archiving? just use Flac encoding.

Flac stands for Free Lossless Audio Codec. By reading the definition well, we learn that it is:

Free: means it can be used at zero cost; The specifications of this format are open source, that is, free to use and are not covered by a patent that would impose the payment of royalties to the owner.
Lossless: Compression with this system is free from loss of audio information, therefore it means that the copy is gradually identical to the original and therefore the listening quality is preserved.
Files encoded in this way can be played on a wide variety of platforms, including PCs, home hi-fi systems, portable players (often called DAPs, short for Digital Audio Player), in the car, and more. Currently, DRM is not implemented, that is, there is no copy prevention method. This standard also supports labels that include cover images.

At this point a series of questions arise:

How can I create Flac files?

Files can be created from a software encoder installed on your computer. The best known is Mp4Gain, a program that additionally allows you to normalize the audio volume.

Can I buy Flac files?

Yes, you can buy Flac files online on the web at specific sites. The feature of these sites is that it can provide some artists with high-resolution encodings that can be up to 4 times higher than a CD – virtually the quality of the original Master recording!

How can I play Flac files?

Files can be played with devices that support this encoding: personal computers, hi-fi systems, portable digital players, and car audio sources. You should read the product specifications and make sure they are compatible.

What are the advantages over an MP3 file?

The quality, above all, equal to that of the original CD from which you made the “Audio Recording” to the high resolution similar to the original master of the recording room.

What are my disadvantages compared to MP3?

The file size, clearly larger. The limited diffusion to date of compatible players with the Flac.

Compared to a CD, what are the strengths and weaknesses of Flac files?

The strengths compared to a CD are the consistency of the quality of the file encoded in Flac, the CD is influenced by a series of variables, the state of wear of the reading lens, vibrations, humidity of the environment determine an intervention Systems to correct errors that affect listening quality. The Flac file, once carefully encoded, will always offer the same listening quality after listening as it cannot be influenced by the factors mentioned above. Storing a large number of tracks is very easy: portable HDs are small in size and very easy to transport. The same number of tracks stored on CDs would be difficult to handle, especially in the car. The weak point is undoubtedly the ease of use: CD players are widespread in all environments, home.

What is FLAC?

FLAC which is short for Free Lossless Audio Codec is an audio codec developed by the Xiph Foundation. Nonprofit org. It is a lossless audio format, which means it produces digital audio files (with a .flac file extension) that are identical to the original source.

In fact, many users who want to back up their original audio CDs (ripped CDs) choose to use FLAC to preserve sound instead of using a? Lossy format.

Doing this ensures that if the original source is damaged or lost, then a perfect copy can be reproduced using the pre-encoded FLAC files.

Of all the lossless audio formats available, FLAC is perhaps the most popular in use today. In fact, some HD music services now offer tracks in this format for download.

Nowadays, listening to music in high definition is no longer a luxury and has become almost a requirement. There is nothing like hearing a song as the artist decided it should be heard. Due to this, various technologies have been developed that allow us to enjoy Hi-Fi audio. Among them are some audio formats, such as FLAC.

Before explaining what the FLAC format is, you need to understand a technicality:

What is bitrate

It is the bit rate, that is, the amount of bits or data that is processed in a given unit of time.

In the case of audios, the measurement of kilobits per second is normally used. For example, if you see that the music is in 256 Kbps quality, it is understood that there are 256 kilobits of information stored in every second of the song.

Since bitrate talks about a quantity of data, the higher this indicator, the more space the song file will occupy on the hard disk. For this reason, audio compression standards have been developed that reduce storage space, among which is the popular MP3, which you surely know.

But this format, as well as AAC, WMA, among others, by compressing the files, eliminates data that affects the sound quality, not like the FLAC format.

What is the FLAC format

FLAC, which comes from the acronym Free Lossless Audio Codec, is an audio file format that can compress them up to approximately 50% without losing information, thus maintaining the audio quality faithful to the original file.

So, if you are looking to store and preserve your music files in digital format, this format is definitely the best option. In addition, it is free and its code is free, so any hardware or software can implement it.

The best audio format after doing computer tests. Finally the truth is revealed.

We know that when you read the word “listen to music” automatically you think of the old and reliable mp3. However, there are multiple formats with individual characteristics that you should take into account if you want to change your acoustic experience.

As a general rule, audio files are classified into 2 types: those that retain all the quality and those that, in order to save space, eliminate quality. The mp3 is in the second type of files.

Check the Pros and Cons of the different audio formats.

Formats that conserve Quality:

–FLAC: Free Lossless Audio Codec for its acronym in English. One of the formats that best preserves the audio quality. Its compression algorithm is excellent and does not generate quality losses, it is open source and the file size when compressed is much smaller
-A THE C; or Apple Lossless is similar to FLAC, but the files it generates are quite large. It has iOS support
–APE: the problem with this format is that it is not very compatible with the vast majority of players, but it is similar to the FLAC or -ALAC format in terms of audio quality. Being very compressed makes the computer’s processor work faster so it is not recommended in low power computing equipment
–WAV and AIFF: they are not compression formats, but exact copies of the original content, differing in the way they save the data. Both take too much space on the hard drive.

Formats with loss of audio quality:

–MP3: MPEG Audio Layer III or MP3, is the most common format you can find
–ACC: it is more efficient than MP3, the files are smaller and it is very popular in iTunes
–OGG Vorbis: it is a free and open source alternative to MP3 and ACC, it is not restricted by patents. However, it is not supported by different players.
–WMA: Created by Microsoft to be the direct competition of MP3, practically the same as the others.

And what is the best audio format?

Making a cold and mathematical evaluation, it turned out that the FLAC format is the best. It does not lose quality, compresses enough without sacrificing quality. It plays on many players … however it has failed to return almost “universal2 as the mp3 did.

For people who do not need extreme audio quality, the mp3 may well be your best ocpion, since it is all in mp3.

One advantage is that Mp4Gain can normalize both formats and equalize them, change their pitchs, their tempos, etc.

That is, Mp4Gain allows you to manage all these formats, you will choose according to your needs.