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What are the advantages of the lossless audio format?

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What are the advantages of the lossless audio format?

Lossless and Lossy Audio Files

The advantage of lossless for storing an audio collection is that the quality of the recordings is much higher than that of lossy codecs and they take up less space than uncompressed audio. It is true that lossy files are smaller than lossless music files. Most modern playback programs understand the lossless format. Programs that cannot play it can easily learn it using the lossless plugin. What are lossless audio formats?

Lossless audio

Lossless audio formats
A true music lover is unlikely to be satisfied with the sound of music recorded in Ogg Vorbis or MP3 compression formats. Of course, if you listen to audio recordings on home audio equipment, sound defects cannot be heard with your ear, but if you try to play a compressed file on high-quality Hi-Fi equipment, you will immediately find the sound defects. . Of course, creating a collection of quality music on CD or vinyl is not easy. There is a reasonable alternative to this path for lovers of high-quality sound – lossless music. It can be stored on a PC in a way that allows you to keep your music’s original settings unchanged, even if compression is applied. In this way it simultaneously solves the problems of high-quality music and its compact storage, since audio equipment for listening (headphones, speakers, amplifiers) is quite affordable.

Uncompressed lossless audio formats:

CDDA is an audio CD standard;
WAV: Microsoft Wave;
IFF-8SVX;
IFF-16SV;
AIFF;
Compressed formats:

FLAC;
APE – Monkey’s Audio;
M4A – Apple Lossless – Apple’s high-quality music format;
WV – WavPack;
WMA: Windows Media Audio 9;
TTA – True Audio.

FLAC format
The most common format is the. It differs from lossy audio codecs in that no data is removed from the audio stream when it is used. This makes it possible to use it successfully to play music on Hi-Fi and Hi-End equipment, as well as to create an archive from a collection of audio recordings.

The great advantage of the format is its free distribution. This is important for musicians who record music on their own. The format has gained a lot of popularity recently, thanks to which its support is included in the vast majority of multimedia players.

APE format
Unlike FLAC, for the APE format there are only codecs and plugins for the Windows platform. For other platforms, there are expensive third-party software solutions. The algorithm is capable of achieving lossless compression of audio information between 1.5 and 2 times. It includes three main stages of encoding, of which only one is based on the use of inherent properties of sound for compression. The rest are similar to conventional filing cabinets. Even though the compression algorithm is distributed free of charge, the licensing restrictions are such that it is practically inaccessible to amateur musicians.

Apple Lossless Format
You can listen to high-quality lossless music using the audio compression codec without sacrificing Apple quality. This format was developed by Apple for use on its own devices. The format is compatible with iPods with special dock connectors and the latest firmware. The format does not use specific rights management (DRM) tools, but the container format contains such capabilities. It also supports QuickTime and is included as a feature in iTunes.

The format is part of the free access libraries, which allows you to organize listening to files in Windows applications. In 2011, Apple released the source codes for the format, opening up broad prospects for the codec. In the future, it can seriously compete with other formats. The tests yielded good results. Compressed files vary in size between 40-60% of the originals. The decoding speed is also impressive, which justifies its use for mobile devices, whose performance is not high.

One of the disadvantages of the codec is that the extension of the audio files matches the audio codec, leading to confusion because AAC is not a high-quality music format. Therefore, it was decided to store the data in an MP4 container with the extension .m4a.

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Lossless audio formats

Lossless audio formats

Lossless audio

Audio files can be converted in a more or less space saving way using lossless or lossy codecs. While the data reduction is absolutely true to the original with lossless codecs, a difference can be heard from the original material, especially with heavy compression with lossy codecs.

Lossless compressed audio files lose approximately 25% to 50% of their original file size. Typical representatives are Monkey’s Audio, FLAC, or WavPack. Modern lossy codecs like AAC, Ogg Vorbis, or MP3, on the other hand, reduce source material by 90% without sounding noticeably worse.

Lossless audio compression

Unlike documents or images, for example, audio files are very difficult to compress, since identical repetitions are very rare in music. But it is precisely on such occurrences that the Huffmann or Lempel-Ziv algorithms depend, which are used in ZIP or RAR, for example. Therefore, most non-clustered compressors employ predictive coding. The signal is divided into a music component and a noise component. Depending on how well this prediction has been made, the noise component should ideally be Gaussian white noise that can be easily compressed using conventional methods.
In the ideal case, the result is 50% compression, which is highly dependent on the piece of music.

Monkey’s Audio, FLAC and WavPack are popular formats for lossless compression of WAV (PCM) files, for example digitized original recordings from the recording studio (for archiving or later processing) or archiving copies of music CDs. The sound quality is always the same as the original and the checksums reveal corrupted files. Increasing hard drive capacity at affordable prices makes “Lossless Codecs” interesting for everyday use.

Uncompressed: WAV (PCM)

WAV is the largest common denominator of Windows audio formats. The Macintosh equivalent is called AIFF. WAV is actually the collective term for various subformats, of which PCM is the most common and is generally equated with WAV.

WAV (PCM) is an uncompressed recording of sound samples: the time signal of a noise is sampled, quantized, digitized, and saved at discrete points in time. The more often and finer you record these values, the better the sound. With CD quality music, this instantaneous value is recorded 44,100 times per second and recorded with 16-bit “precision”, that is, 2 ^ 16 = 65536 possible values.

With the help of special programs (eg CDex, EAC, Audiograbber), Audio CDs can be transferred to the hard disk as WAV (PCM) files. Viewed in this way, WAV (PCM) files are copies of the original, provided the CD-ROM drive is not read incorrectly or the CD is damaged. One minute at CD quality requires roughly 10MB of storage space, which is not as happy to give away even in the age of ever-larger hard drives.

On the PC, WAV (PCM) and CD-quality (44.1 kHz, 16-bit, stereo) audio files are often the starting material for creating space-saving audio files in formats such as MP3. However, for sound processing on the home PC, WAV (PCM) is the first choice.

Monkey’s Audio

Monkey’s Audio is a lossless audio codec for PCM wave files. Monkey’s Audio comes with a convenient program interface (in English), over which files can be compressed, decompressed, verified or tagged. PCM wave files (any sample rate, 8/16/24 bit, mono or stereo) or corresponding Shorten or WavPack files are accepted as source files. Monkey’s Audio does not support multiple channels.

The APE tags that are used to store the title information can be supplemented with their own fields and are therefore very flexible. They are now used in conjunction with other audio formats as well.

The included command line encoder allows integration into other programs. Various audio players support the format through plugins. A plug-in for Winamp can be installed at the same time as installation. Monkey’s Audio is a Windows program by default. However, there is a platform independent version of Java.

FLAC

FLAC stands for “Free Lossless Audio Codec”. There are several lossless audio codecs available. FLAC is suitable here for several reasons: FLAC follows the open source philosophy (free open source code, available for many operating systems), works very fast, has a good and secure framework structure.

What are lossless file formats

Whether it is image, music or video files, it is important to understand the difference between different types of formats and when to use them. Using the wrong format can ruin the quality of a file or make the file size unnecessarily large.

file audio differenze

Some types of media file formats are “lossy” and some types “lossless”. We will explain what these terms mean for the benefits of each type of file format and why you should never convert lossy to lossless formats.

Compression explained.

We use compression to make files smaller so they can retrieve faster and take up less storage space. For example, when you take a photo, your camera captures all the light you can get and collects an image. If you save the image in RAW format, which retains all the clear data that the camera sensor receives, the image can reach 25 MB. (Depending on image resolution: A multi-megapixel camera provides a larger image.)

comprimere i-grandi-audio

If we upload these files to a social network or put them on a website, we don’t want these image files to take up so much space. A photo gallery with RAW images could take hundreds of megabytes of space. RAW formats can be used by professional photographers to maintain high image quality during the editing process, but they are not intended for the average person.

Instead, our camera or smartphone converts the image into a JPEG file. JPEG files are much, much smaller than RAW images. When you convert RAW to JPEG, some of the image data is “discarded”, which produces a much smaller file. The conversion process uses a compression algorithm that works well for photos, so they can look pretty good despite compression. You can still see compression elements, depending on the quality settings.

Note that lost formats generally have a setting that controls their loss. For example, JPEG has a variable quality setting. Low quality produces a smaller JPEG image file, but the image quality is significantly poorer. Below is a close-up example of a lost JPEG: various “compression artifacts” can be seen.

We call RAW a “lossless” format because it retains all the original data in the file, while we call JPEG a “lost” format because some data is lost when we convert an image to JPEG. However, these are not the only design and loss-free formats.

Images: RAW, BMP and PNG are all image formats without data loss. JPEG and WebP are lost image formats.
Audio: WAV is a container file that is often used to contain lossless audio, although it is also capable of containing lost sound. FLAC is a lossless audio format, while MP3 is a lossless audio format.
Video: Consumers use few lossless video formats as they involve video files taking up a large amount of space. Common formats like H.264 and H.265 are all lost. H.264 and H.265 can deliver smaller files with higher quality than previous generations of video codecs because it has a “smarter” algorithm that is better at choosing which data to discard.
Some of these lossless formats also provide compression. For example, a WAV file generally contains uncompressed audio and takes up little space. A FLAC file may contain the same lossless sound as a WAV file, but it uses compression to continue creating a smaller file. Formats like FLAC provide no data: they store all data and compress them intelligently, just like ZIP archives. However, they are still much larger in size than MP3s that throw a lot of data.

A conversion can be a loss, even between formats without data loss. For a conversion to be effectively lossless, the data in the original file must fit within the destination file. For example, loss without FLAC files only supports 24-bit audio. If you converted a WAV file containing 32-bit PCM audio to FLAC, the conversion process must generate some data. The conversion process between a WAV file containing 24-bit PCM audio in FLAC would be lossless.

Lossless audio formats

WAV (.wav) The WAV format is nothing more than a digital recording of real sounds, sounds that come from a source outside the PC. With WAV music, drums, piano, guitar, bass or vocals are heard the same, no matter what computer the file is played on (with the same acoustic quality of hardware components, of course).

DSD (DFF, .Dsf) are used in digital media such as Super Audio CDs. Sampling quality is very high (variable sampling rate is approximately 64 times higher than for audio CDs), although according to several operators in this sector, it must be absolutely determined whether the final quality is higher than the sampling quality. PCM (used in high quality Blu-Ray and DVD Audio). I can reproduce free readers like Foobar 2000 or AIMP on our computer.

AIFF (.aif). It’s the Apple audio format used by Apple for Mac. It’s basically the WAV equivalent used by Windows.

APE (Mono Audio; .ape): Ordinary with a loss that allows us to reduce by about 50% the space occupied by our music (in some cases even more), without losing quality. In this way, an album that takes up about 600 MB in wav format averages 300 MB (much more than about 100 MB of high-speed mpc and 60 mp3 mp3, but the quality is the same as the original); On average, I speak because there are certain types of music where the level of compression is even higher. You can use WinAmp plug-ins to listen to songs in this format, or better yet, a player that uses it natively as Foobar 2000. Right now, it’s probably the best lossless codec, considering the balance between speed and compression (Click here for a lossless comparison table) format.)

Apple Lossless Audio Codec – ALAC (.m4a) This is a lossless audio codec created by Apple a few years ago and available as an open source from Apple since October 2011. Some programs support it in Windows (encoded). , including DbPowerAmp.

FLAC (.flac): a very popular open source format. It used to be very popular (among music purists), but some space has been lost with the MonkeyAudio bee format, which allows for better compression in the same quality. Compared to others, it always came in .ape format (but also after WavPack).

LA (Lossless Audio: .la): The lossless format that compresses the most. Conversion to this format is very slow, but achieves the best compression in history (for example, MonkeyAudio, this album would take up about 290 MB compared to 300 MB in APE). This is not widespread, as some MB obtained on a bee is not worth the long wait (and less support from third-party programs), but it is the winner of my lossless format comparison.

OPTIM FROG (.ofr) – Excellent lossless codec, best after LA as compressibility. Compression, when set to slightly high levels, is about 3 times slower than Monkey Audio and the gain in MB is about 2%. Like all other formats on this site, you can listen without the addition of Foobar 2000.

WAVPACK (.wv, wvc) – is a valid open source compression format that allows lossless, lossy and hybrid results. The compression rate is high and the compression is good. Another interesting hybrid format is that the lossy file is merged with another file, which allows you to completely restore the original file without loss in case we want to restore it.

What are the most popular audio formats?

There are dozens of audio files that we can use to convert a song, but the really useful ones can be counted on the fingers of one hand.

When we think of an audio file, most of us immediately think of MP3. Without a doubt, it’s one of the most popular audio formats, but it’s not the only one. Let’s see what are the most popular audio formats and what are the differences in use. And we have to choose that according to our needs.

There are different categories of audio files. First we defined the formats as uncompressed. The word itself defines this section of the file. In this case, the recorded sound waves are actually converted into a digital format without further processing. What does it all mean? In files that are very difficult to save and take up a lot of space. In order to simplify the storage of audio files and to reduce the load, formats with lossy data compression were created. These sacrifice some quality in favor of the small storage space required.

To fix this error, which represents the loss of quality in favor of file size, compressed audio formats were created without loss of data. Obviously, they’re not small files like lossy compression, but they’re still smaller than uncompressed. However, it must be said that these types of formats are only widespread in certain cases.

PCM

PCM is the most common and widely used audio format on CDs and DVDs that we have at home. It is the faithful conversion of analog audio into a digital file. It is no coincidence that it is an uncompressed audio format. Remember that analog sounds exist as waveforms. In order to convert a sound wave into digital bits, the sound must be sampled and recorded at certain intervals.

WAV

WAV stands for Waveform Audio File Format (previously it was also called Audio for Windows, now it is no longer). It is a standard developed by Microsoft and IBM in 1991. WAV files can contain compressed and uncompressed audio formats. In most cases, however, they are used for uncompressed people. Although it was developed for Windows, it can also be safely opened on a Mac.

MP3

This is without a doubt the most popular audio format. It was released in 1993 and over the years its success has increased thanks to the combination with the pieces of music. Why are they used so often? Quite simply, these are lossy compressed files, and the generated files are so small that users can create a music library without taking up too much space. And the quality? It is much lower than other formats, but the human ear doesn’t always manage to notice the difference significantly. MP3 is also a universal file. It can be found on smartphones, computers, smart TVs, tablets and many other electronic devices.

WMA

WMA stands for Windows Media Audio. It was first published in 1999 and has gone through several developments since then, always keeping the same name. As you can easily guess, it is an audio format created by Microsoft. It was developed to replace MP3s. Unfortunately, there are very few platforms that support this, so the MP3 mastery has never been compromised.

OGG

OGG is not a real compression audio format. We can define it as a multi-purpose multimedia container. It can contain all types of audio formats, but is often used to contain Vorbis files. It is one of the best performing files to reduce size without losing quality.

FLAC

FLAC stands for Free Codec Lossless Audio. It is a lossless, compressed format that was created in 2001. A FLAC file can be compressed to 60% of its original size without minimal loss of sound quality. It is also an open source format. Because of this, it is compatible with most programs and devices. It is the best quality alternative to MP3.

Compressed audio with loss

Today we will analyze the audio files that have a loss of quality. Because digital audio files can be divided into two classes, those that are compressed suffer a loss of quality and those that have not had any loss.
The difference We will see later but for now we will be clear that each of the formats offers a different quality according to the algorithm that has been used to compress the music in order to save space on the hard disk.
Some definitely discard information which is normally sought to be inaudible information for the human ear or to be repetitive information, so even when information is discarded, quality is not lost.

Compressed digital sound files fall into two categories: those that have suffered lossy compression and those that have not.

Loss compression means that an algorithm that uses a smaller amount of information has been used. The resulting file differs from the original.

MP3 or MPEG1 Audio Layer 3

It is the most widespread and used compression format, in its various variants. The loss of information that involves the mp3 format passes (almost) unnoticed to the human ear.

An mp3 file can occupy up to 15 times less than its original while retaining high quality. This is why the standard for streaming is considered and is the most suitable type of file for use on the internet and for portable media.

WMA or Windows Media Audio

WMA is the Microsoft audio compression format. It was designed for playback with the Windows Media Player program.

WMA is the direct competitor in mp3 quality and compression with the difference that it adds author information. Its extension is * .wma.

Recently, Microsoft has developed a variant of the WMA format with compression, but without loss.

OGG Vorbis

Ogg Vorbis is a container format developed in open source, freely distributed and without a patent. This is the biggest difference with the rest of compressed audio files.

Files in this format have a high quality and can be played on almost any device. Its use is much less widespread than the previous ones, although, in some cases, it gives better results.

Its use is patent free. Therefore, many media players, such as the popular VLC, include Ogg codecs that, on the other hand, can be freely downloaded from the Xiph.org website. Its extension is * .ogg.

Encoding digital audio with a loseless format?

Compressing a digital audio with loss is to reduce the size of an audio file.

Codecs are used to reduce the size of the files. Some of the operations that codecs can perform to reduce file sizes are as follows:

Reduce the bit rate of the original sound so that the audio takes up less space.
Remove sounds at frequencies that are not noticeable by the human ear.
Elimination of redundancies of the audio signal.
They can reduce the number of existing channels by transforming a surround sound to Stereo.
Reduce the number of bits per sample.
Etc.
Note: The compression process of an audio is extremely complex. In addition, each codec applies different methodologies to compress the size of an audio.

Obviously during the compression process there will be a loss in audio quality. The higher the weight reduction of the compressed file, the higher the loss of quality.

UTILITIES THAT YOU HAVE TO COMPRESS AN AUDIO

Obviously compressing an audio has certain utilities. Some of them are as detailed below:

The space needed to store the songs on our hard drive will be much smaller. Although hard drives are cheap and their storage capacity is large, it is not feasible and / or practical to store all of our songs without loss.
We can pass the audio files to third parties in a much more convenient and fast way. After compressing a music song we can pass it by email or other means without any problem.
It seems that the trend in the very near future will be to consume video and audio via streaming. Therefore the compression of video and audio is very important. If we offer a web service in which we provide streaming audio, it is essential to compress the audio to save bandwidth and so that customers can play it at home without problems.

Select the compressed audio file format

There are numerous types of compressed file format with loss. Some of the most popular are the following:

.mp3
.ogg
.wma
.m4a
.aac
Depending on the needs, it may be useful to select one format or another.

However in my case I recommend using the mp3 or ogg file format. The reasons are as follows:

The .mp3 files do not stand out for providing the best audio quality. However, the .mp3 format is the most universally extended.
Any music player is capable of playing the .mp3 file format. You cannot say the same of the other file formats.
Everyone is able to play audio in .mp3 format. Even people with little knowledge technologically speaking.
If someone does not want to use the .mp3 format because they think the quality is not enough, or because it is a proprietary format, I recommend using .ogg. In the following link you can find the advantages and disadvantages of the .ogg files with respect to the .mp3 files.
Select the audio compression codec (encoder)

Once the file format is selected we must be aware of the codec that we will use to perform the audio compression.

In the case that we want to compress in the .mp3 file format there are the following codecs:

FHC: It’s the first codec that existed. At present this codec has become obsolete. Its compression time is very high and does not support variable bit rate.

Xing: It is the fastest encoder and allows you to obtain files with a variable bit rate (VBR). However, the quality level offered by this type of encoder is lower than Blade and Lame.

Blade: Until Lame’s appearance was the best option. It is slightly slower than Xing, but the quality levels obtained are much better. Currently this host has a problem and it does not support variable bit rates.

Lame: It is available under the GNU license and is also the best host available today. It supports variable bit rates, is fast and the quality obtained is better than in the rest of the encoders.