Lossless audio compression explained


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Lossless audio compression explained

LossLess Audio compression

FLAC is perhaps the most popular lossless audio format and encoding codec.

lossless audio compression

Music lovers are gradually switching to this format. WavPack competes with it, but it is not that popular. It’s the same story with Apple Lossless, which reduces the size to 60%.

Here the story is exactly the opposite: the quality is better and the size is greater.

Skeptics say that it is almost impossible to distinguish MP3 (320 kbps) from Losless by ear. “And if there is no difference, why pay more?” In fact, on ordinary equipment, it is quite difficult to feel the difference in audio formats, even for music lovers. But there are those who immediately feel this difference (they personally attended the experiment). But when listening to a good device, the difference is huge. The problem is that not everyone can afford a good device.

Compressed using special lossless audio codecs, it can be restored with absolute precision if desired.

If you take a normal audio CD disc with analog sound, record it in WAV format for uncompressed sound, then compress WAV using lossless codec, then decompress the resulting sound file into WAV and burn the result to a blank CD , you can get two completely identical audio files COMPACT DISCS.

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 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 your PC in a way that allows you to keep the original music 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.
LPAC;
OFR – OptimFROG;
RKA-RKAU;
SHN – Shorten.
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 grown in popularity lately, 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 the 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. Despite the fact that the compression algorithm is distributed free of charge, the licensing restrictions are such that it is practically inaccessible for 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.


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Flac what is it and why is it better than mp3

At the end of the 90s the engineer Leonardo Chiariglione together with Hiroshi Yasuda founded the MPEG group, creator of the MP3 audio compression algorithm that revolutionized the world of audio. Since then, music has become “liquid” and no longer needs a physical medium such as cd, disk, cassette to listen to the songs.

flac vs mp3

MP3 audio files began to invade the world thanks to the Internet and sharing programs like Napster. The mp3 had the merit of “compressing” the volume of files that could be shared even with those who did not have much bandwidth, even with a 56K modem. The audio quality was excellent, but for audiophiles it was not enough. At this point the FLAC enters the scene.

FLAC (Free Lossless Audio Codec) is a music file format that offers perfect copies of a music CD, but at half its size. It is compatible with many phones (including iPhone, with an app), portable MP3 music players, CD players, and hi-fi stereos. FLAC files are available for roughly the same price as the MP3 equivalent in online stores and they sound much better.

Today, almost all record labels sell songs in this format online and consumers can purchase lossless music from leading independent artists.

flac

FLAC first appeared in 2001 as an open source alternative to other lossless formats that emerged at the time. These include Apple Lossless (ALAC), Microsoft WAV (Waveform Audio Format), and WMA Lossless. But these formats had drawbacks. While ALAC has a loyal following among iPod and iPhone users, it hasn’t had much circulation outside of Apple products.

The WAV format is very popular among Windows users and is compatible with iOS devices, but the problem is the file size, they are very large and cannot contain the “tag” data: artist, album name, lyrics , etc. .

The FLAC format not only supports tags, but is also compatible with most music players. Apple is the only real obstacle, because while in 2017 there was talk of hardware support on both the iPhone 8 and X, in the end nothing was done. However, there are simple solutions for both iOS and Mac users.

WHAT IS THE DIFFERENCE BETWEEN MP3 AND FLAC?

MP3 is a lossy format, which means that parts of the music are removed to reduce the file size. It is supposed to use “psychoacoustics” to remove overlapping sounds, but it is not always successful. Drum cymbals, reverb, and guitars are generally the sounds most affected by MP3 compression and can sound really distorted when too much compression is applied, especially when it goes below 128 kbps.

Like MP3, FLAC has been embraced by the music industry as a cost-effective way to distribute CD-quality music and does not have the hearing impairments of MP3s. The FLAC is lossless, it is similar to a ZIP file, it is almost the same as the original when unzipped. Previously, the only way to get files “lossless” was through the uncompressed CD formats CDA or WAV, but neither is as space efficient as FLAC.

HOW MUCH SPACE DOES THE FLAC TAKE UP?

While FLAC files are up to six times the size of an MP3, they are half the size of a CD and can have the same increase in audio quality. Also, FLAC is not limited to just 16 bits (CD quality), it can go up to 24 bits / 192 kHz.

But regardless of whether you are using 16-bit or 24-bit quality files, FLAC has become a standard in the field of music. Despite competition from proprietary formats like MQA and DSD, FLAC remains competitive.