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MAXIMUM SOUND QUALITY. LOSSLESS FORMAT

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MAXIMUM SOUND QUALITY. LOSSLESS FORMAT: WHAT IS IT? HIGH QUALITY MUSIC IN LOSSLESS FORMAT

Lossless Audio

Today there are about three dozen common digital audio formats. Why you need to create so many types of sound files to store one type of content and how to manage all this, you will learn from this material.

Lossless Audio

Surely many users prefer to use their home computer not only as a workhorse, but also as a multimedia center, where they can watch movies or family photos, as well as listen to their favorite music. Although compact digital players or mobile phones are certainly more suitable for listening to musical compositions, but unlike them, a computer can not only play music.

No matter how big the built-in memory of your music player is, it will most likely be difficult to store your entire music library on it. Additionally, using a PC, you can create, edit, organize, and search for music. Also, don’t forget that there are around three dozen common digital audio formats today, and most players are far from omnivorous and can only play a few of them.

So why do you need to create so many music formats to store one type of content? The point is that in the vast majority of cases the sound is stored in a “compressed” form, since one minute of uncompressed composition occupies about 10 MB on the hard disk. On the one hand, this seems not to be much, but on the other, if you are a music lover and your collection consists of several hundred or even thousands of songs, then it is clear that the sound must be compressed to reduce the space it takes up electronic media.

Various special algorithms are used to compress music files, which subsequently determine the structure and presentation of the audio data, or so-called digital audio file formats. All audio formats can be divided into three groups: uncompressed audio formats, lossless compression, and lossy compression.

NO COMPRESSION

One of the most widespread formats related to this type is the well-known WAV. The sound of files with this extension is stored without compression or changes. It is true that much more space is required to store uncompressed files and therefore WAV is more widely used only in professional audio and video applications, where the sound should not have a loss of quality before processing. Storing ordinary musical compositions in this form is an unwarranted waste.

To play WAV files, you do not need any special software, as all media players understand this format, including the standard Windows Media audio player built into the Windows system.

Another format used to store uncompressed audio that is worth mentioning is Apple’s development called AIFF (Audio Interchange File Format). As you may have guessed, it is most commonly used on Macintosh computers running Mac OS X.

LOSSLESS COMPRESSION (NO LOSS)

Lossless compression algorithms for audio files work on the principle of conventional file cabinets. They do not provide the highest level of compression (40 to 60%), while they have virtually no effect on sound quality. It is also worth noting that in this case, the encrypted data can be fully restored to its original form. Therefore, the use of lossless compression is most often used in cases where it is important to preserve the identity of the compressed data with respect to the original.

The most popular audio formats in this group are FLAC (Free Lossless Audio Codec), APE (Monkey’s Audio), WMA (Windows Media Lossless), and ALAC (Apple Lossless Audio Codec). Each has its own pros and cons. For example, the APE codec offers slightly better compression gains, while FLAC is more common. In general, all true music lovers store their music collections in lossless formats, since they do not remove any data from the audio stream, and files created with these codecs can be listened to even on high-quality stereos.

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Lossless formats: flac, ape, wv, dts, and other digital audio formats

Lossless formats: flac, ape, wv, dts, and other digital audio formats

Free Lossless Audio Codec

Recently, in the open spaces of the Russian Internet, music in Lossless formats has been found more and more often, which can not fail to delight connoisseurs of free real quality. But sadly, files with the flac, ape, wv, dts permission cause a “RAM” stupor for a common user and he walks in search of his usual mp3. Well what can I say, Epic Fail, comrades?

lossless audio

This guide provides a detailed description of lossless formats and describes in detail how to read and write such files …

Theory: lossless formats

Lossless data compression is an information compression method, whereby encoded information can be retrieved with bit precision. This fully recovers the original data from the compressed state. This type of compression is diametrically different from lossy data compression. As a general rule, each type of digital information has its own lossless compression algorithms.

FLAC and APE codecs are the main Lossless formats today

FLAC (English Free Lossless Audio Codec) is a popular free codec for audio compression. Unlike the lossy Ogg Vorbis, MP3 and AAC codecs, it does not remove any information from the audio stream and is suitable for both daily listening and archiving an audio collection. Today, the FLAC format is compatible with many audio applications.

Monkey’s Audio (APE) is a popular lossless digital audio encoding format. It is distributed free of charge along with open source code and a suite of encoding and playback software, as well as plugins for popular players. Monkey’s audio files use the following extensions: .ape to store audio and .apl to store metadata. Despite being open source, Monkey’s Audio is not free, as its license imposes significant restrictions on its use.

After downloading music on Lossless, you can burn it to CD in the future and listen to it with Hi-Fi (or other) class acoustics, while normal CD quality will be.

For comparison, bitrate:

-mp3 ~ 320 kb / s

-FLAC and APE ~ 1000 kb / s

Theory:

SACD, DVD-Audio, DTS-CD and others multi-channel music formats.

SACD stands for Super Audio Compact Disc, an optical disc format for storing music. It looks like a normal CD, some discs can be seen with the naked eye: their working side is yellow. The sound in SACD is recorded in a completely different format: DSD (Direct Stream Digital) and they are reproduced only in special players.

features:

– Multichannel: 6 channels of audio can be recorded

– A completely different type of recording (DSD), which provides better sound quality compared to a CD.

– Conditional compatibility with older players: there can be two layers to a disc: normal CD (stereo) and one or two SACD variants (stereo / multichannel).

That is, if the disk:

Single Layer (“Single Layer”) – Read-only on SACD players.

Double Layer or “Hybrid” (“Double Layer” or “Hybrid”): Read on both conventional CD players and SACD players.

All SACDs have CD text – text information about album, artist, and track.

Lossless sound quality

Lossless sound quality

Lossless Audio

This group of formats records, encodes the sound in such a way that by decoding it it can be restored exactly.

Lossless Audio Compressor

The most popular lossless encoding formats are:

FLAC (Free Lossless Audio Codec)

APE (mono audio)

ALAC (Apple Lossless Audio Codec)

Loss of sound quality (lossy)
Lossy compression modifies the sound. For example, frequencies inaudible to the human ear are eliminated. The decoded file will differ from the original in terms of the information recorded on it, but it will sound almost the same.

Popular lossy formats: MP3, WMA, OGG, AAC. [2]

Bit rate is the amount of information transmitted over a certain period of time. The essence of its principle is how much information we can dedicate to each second of the reproduction of our audio file. It is generally accepted to use Kbps (kilobits per second) or Mbps as units.

1. Constant Bit Rate Coding (CBR, Constant Bit Rate): An encoding mode in which the bit rate remains unchanged regardless of the nature of the music. The main task of the encoder in this case will be the need to obtain the highest possible file quality with a constant stream.
2. Average Bit Rate Coding (ABR, Average Bit Rate): intermediate coding mode between CBR and VBR. When encoding, the desired average bit rate is indicated. If necessary, the encoder can slightly increase or decrease the bit rate to achieve a higher quality / size ratio. The downside of ABR mode is the lower quality than VBR mode. The advantage is a more or less uniform flow and, as a result, an easily predictable file size.
3. Variable Bit Rate (VBR) Encoding – A mode of encoding in which the desired quality level is set at the encoder. When encoding, the codec chooses the bit rate required to compress each fragment of the recording, while the range of bit rates used can be very large. This mode allows you to achieve the highest quality / size ratio, but the size of the resulting file is often difficult to predict (for example, when compressing with musepack -normal, the average file bitrate can be 140 or 210). The disadvantage of VBR is the impossibility of using it for Internet broadcasts with a small channel width. [3]
SBR (Spectral Band Replication) is a technology that allows you to restore high frequencies using information contained in other regions of the spectrum and a small stream of additional data.

DRM (digital rights management) is a set of tools designed to protect a recording from illegal copies.

The digital audio format is a format for representing audio data used in digital audio recording, as well as for additional storage of recorded material on a computer and other electronic media, so-called audio media. [4]

An audio file (a file that contains a sound recording) is a computer file consisting of information about the amplitude and frequency of sound, saved for later playback on a computer or player.

The file format determines the structure and presentation characteristics of the audio data when stored on a PC storage device. To eliminate the redundancy of the audio data, audio codecs are used, with the help of which the audio data is compressed. There are three groups of audio file formats:

1.Uncompressed audio formats like WAV, AIFF
2.Lossless compressed audio formats (APE, FLAC)
3.audio formats using lossy compression (mp3, ogg)
Sound quality is a very subjective parameter and can vary greatly from person to person. If we are talking about the so-called music file encoding, when the audible differences between the original file and the file obtained by decoding a compressed audio file are not desirable, then it is assumed that the music will be played on Hi-Fi equipment (or even Hi-End) of high quality, and not at all. on computer speakers that cost $ 15-20. Modern codecs allow you to achieve the sound of an encoded file, which is indistinguishable to the ear from a CD, even with good equipment, with a compression ratio of about 1: 5. To listen to music every day on a computer, generally choose a higher audio compression ratio (up to 1:10 or even 1:20), as a result it is possible to create smaller files at the expense of lower quality. Subjectively, it may not change: in particular, ordinary computer speakers often introduce noticeably more distortion.

FLAC, WAV, MP3, DSD, ALAC … What audio format should I use?

You probably know the famous MP3 audio format. There’s even a good chance that you only use it on a daily basis. But did you know that it is possible to take your music to the next level thanks to other audio formats? If the terms FLAC, DSD, sample rate, or even lossless don’t mean anything to you, then you’ve come to the right place. Designed specifically for newbies, this guide tells you everything you need to know about the basics of digital audio.

soundwave

FLAC, DSD, ALAC … Listening to a debate between audiophiles can seem difficult when you do not know this universe and the many acronyms that refer to it. But if you try the adventure, you will not regret it. Say goodbye to your boring and lifeless MP3s and hello to quality music. Trust us, your ears will thank you!

Sample Rate and Bit Depth: The Basics of Digital Music

Before knocking you out (we promise we won’t hit too hard) with barbaric acronyms in every way, let’s first focus on two essential notions of modern audio, namely sampling rate and bit depth. These two elements give an idea of the recording precision of a song.

but depth

As you know, computers run on bits, which are sets of 0 and 1. During a passage in the studio, music produced by an artist must be digitized, therefore transformed into 0 and 1 in order to be recorded on CD or transmitted to through transmission services. This is where the sampling rate and bit depth come into play.

Take the example of a CD. Our beloved empanadas are recorded in 16-bit / 44.1 kHz. The 44.1 kHz sampling rate means that the music produced by our musician is analyzed 44,100 times per second by studio recording devices. As for the bit depth, it gives an indication of the number of information recorded during this same period. The greater the depth, the more information will be encoded at the end.

However, CD quality is not the best in the world, even if it far exceeds MP3. Thus, we find 24-bit / 192 kHz recordings. The DSD goes even further with a frequency that rises to several MHz. But for simplicity, just remember that the higher the values described above, the more accurate the recording will be in your sound reproduction.

Lossy formats: MP3, AAC, OGG

In general, there are two types of formats in the audio world: lossy, lossy in English, and lossy, or lossless. If you want the best audio quality, stay away from compressed formats.

The best known of all is MP3. True dinosaur in the audio world, this type of file was developed at a time when the capacities of our hard drives were determined in MB and not in TB. Therefore, we had to compress the recordings as much as possible, even if that meant putting quality aside.

It is true that MP3 encoded music weighs only a few megabytes. But the applied algorithm is very aggressive, it simply cuts the frequencies considered inaudible by the human ear. In fact, MP3 loses many audible parts. To get an idea, click the link below, you will hear these famous truncated parts. The pieces seem flat, devoid of life. Listening can even become unpleasant after several tens of minutes. Suffice it to say that, apart from its small size, MP3 is no longer really interesting in our time if we are looking for quality music.

To make things better, Apple, meanwhile, released another audio format, AAC, for advanced audio encoding. This is also a lossy format which therefore loses details during data compression. However, the algorithm used is more efficient, cutting fewer important frequencies, at least on paper. In absolute terms, the difference from MP3 is not necessarily stark and the debate has been raging for years in the audiophile environment to find out if the AAC format is really better than MP3.

Finally, there is also the OGG Vorbis, another lossy compressed format. Like AAC, it is supposed to work better than MP3. This is the type of file Spotify uses. Her interest is to enable efficient transmission while reducing quality. However, the songs encoded in this format are not fabulous. The ideal is really to become lossless.