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Lossless Audio Part 3

Resilient metadata: New types of metadata blocks can be defined and implemented without affecting the use of old decoders and data streams.

Existing metadata types include tags, reference tables, and ranking tables. Registered applications can define their own dedicated metadata types (Note: this is similar to the MIDI standard).
Great for archiving applications: FLAC is an open and lossless encoding format, you can convert it to any other format you need. In addition to CRC and MD5 marking of each data frame to ensure data integrity, FLAC also offers a verification (verification) option; when using this option to encode
Easy CD Backup: FLAC has a “reference table” metadata block that contains the list of CD contents and index points for all tracks. You can save a CD into a single file and import the CD reference table, so that one FLAC file can record all the information of the entire CD completely. When your original CD is damaged, you can use this file to restore an exact copy of the original CD.
Damage Resistance: Due to the frame structure of FLAC, once the data stream is damaged, the loss will be limited to the damaged data frame. Usually only a short segment is lost. When many other lossless audio compression formats suffer corruption, one corruption will cause all subsequent data to be lost.
Features that FLAC does not have:
The data is reduced. FLAC is designed specifically for lossless compression only, you can choose from many other great lossy compression methods like Vorbis, MPC and MP3 (LAME provides an excellent open source implementation).
SDMI compliant (eg cetera). FLAC will not support any copy protection method, which actually ends up wasting data. (Looking at it another way, since all of these means ultimately proved to be ineffective, one could also say that FLAC compresses this useless data to zero!) Of course, we can’t prevent someone from using a dedicated metablock for copy protection, but They Protection will only work on their own decryption products, other decoders will bypass these specialized metablocks.
. How to play FLAC files?
1. FLAC is a lossless audio compression format. It can be played by foobar2000 and winamp…because they all have FLAC decompression plugins. If your player cannot play it, it is recommended that you go to the following address to download the plug-in and install (this is the winamp flac the plugin and install (this is the player plugin
2. With JetAudio, the interface is simple and convenient, and it directly supports playing FLAC files, that is also worth mentioning.
WV formatedit broadcast
Characteristics
WavPack is a free, open source, lossless audio compression format developed by David Bryant.
Open source, the license is also free, the compression ratio is between ape and flac , and there is also fault tolerance
WavPack allows users to compress and restore 8-, 16-, 24-, and 32-bit floating-point representations of WAV-format audio files, and also supports multi-channel data streams and very high sample rates. Like other lossless compression mechanisms, the compression ratio of this algorithm varies with the source data, but is typically between 30% and 70% for normal pop music, and between 30% and 70% for normal pop music. for classical music and other sound ranges. gives better results.
Additionally, WavPack features a unique “mixed” mode, which uses an additional file that also has the benefit of lossy compression. Unlike other methods that output only one file, this mode outputs two files, one is a relatively small high-quality lossy compressed file that can be used alone, and the other is used together with the lossy file for data recovery. lossless data “Correction” file. For some users, this means they don’t have to worry about using lossy or lossless compression.

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Lossless Audio Part 2

FLAC Overview

FLAC stands for Free Lossless Audio Codec – Free lossless audio compression. That is, the audio is compressed in FLAC without losing any information. This compression is similar to Zip , but FLAC will give you a higher compression ratio, because FLAC is a compression method specially designed for the characteristics of audio, and you can use the player to play the compressed FLAC file like you normally play MP3 files like

FLAC system support
FLAC is free and is supported by most operating systems, including Windows, “unix” (Linux, *BSD, Solaris, OS X, IRIX), BeOS, OS/2, and Amiga. And FLAC provides a build system in autotools, MSVC, Watcom C, and Project Builder development tools.

FLAC project content
The format of the data stream is provided in the form of a FLAC Reference Encoder and Decoder Library, a command line program that can encode and decode FLAC files Metadata editor for Input plugins for different audio players

FLAC Features:
Lossless Compression: The encoded (PCM) audio data is lossless and the decoded output audio is the same in every byte of the encoder input. Each data frame has a 16-bit CRC check code of the current frame, which is used to check for data transmission errors. For all audio data, an MD5 tag for the original uncompressed audio data is also stored in the file header
Fast: FLAC places more value on decoding speed. Decoding requires only integer operations and has low computational speed requirements relative to most encoding methods. Real-time decoding can be easily achieved on very common hardware.
Hardware support: Since FLAC provides a free decoding paradigm and decoding complexity is low, FLAC is currently the only hardware supported lossless compression. which has hardware support.
Streamable: Each FLAC data frame contains all the information needed for decoding. The current frame is decoded without reference to the data frame that precedes or follows it. FLAC uses sync and CRC codes (similar to encoding formats like MPEG) so that the decoder can have minimal time delays when locating jumps in the data stream.
Positionable: FLAC supports fast sampling and precise positioning. This is not only beneficial for playback, but also makes FLAC files easier to edit.

lossless audio

As a standard for digital music file formats, the WAV format is too large to use easily.

Therefore, generally, we compress it to MP3 or WMA format. Compression methods include lossless compression, lossy compression, and hybrid compression. MPEG and JPEG belong to hybrid compression. If the compressed data is restored, the data is actually different. Of course, the human ear cannot tell. Therefore, if the MP3 and OGG formats are restored from the compressed state, there will be losses. However, APE and FLAC formats retain their original lossless sound quality even when restored. Therefore, APE and FLAC can be compressed and restored with high sound quality without loss. Under the premise of fully maintaining sound quality, the compression capability of APE has been properly reduced.
However, it is an idea that many people have had long ago to apply APE’s form of lossless audio compression to MP3 players. Compared with CD, MP3 is more convenient and practical. The earlier statement that MP3 replaced CD and MD was the biggest hurdle due to sound quality.
broadcast monoedit format
Obtaining APE source files
A few years ago, everyone had a tape recorder and thought it was good to listen to the music on tape, now there are a lot of CDs and DVDs, and the sound effect is better than that of tape. However, the music on the CD cannot be recognized directly in Windows, and cannot be directly copied to the hard drive (Windows can recognize other formats, such as data files, VCD, DVD, etc., only CDs cannot be recognized directly). . outside). Therefore, in order to copy the songs from the CD to the hard drive, special software is needed to do this. This is called ripping. There are many softwares that can perform this function. The most common and the best is EAC (EAC .exe) This software, the music captured by the track is saved to the hard drive in the form of wav .
Compression in APE format:
When the songs on the CD are copied to the hard drive (i.e. ripped), the original file ( WAV ) is usually very large. For example, the music on a CD is about 700M. If it is separated into each song, the size of each song file is 20-60M. These large files take up hard drive space and are not suitable for sending over the Internet. Therefore, this large original file is usually compressed. There are many types of compression methods, which can be divided into two categories: One is lossless compression, which can be achieved with monkey software (monkey.exe), which can compress the original music file (WAV file) into 50-60%. of the original size, the file format is APE .
Another type of compression method is called lossy compression. The advantage is that the file can be compressed to a smaller size, for example it is more than 1 times smaller than the ape file. The common lossy compression format for music is MP3. But the downside is loss of sound quality, generally the smaller the file is compressed, the worse the sound quality.
Online delivery:
At present, more and more people choose the APE format, and network communication is inexorable. Many music enthusiasts trade music in APE format online. The search for “APE music download” on Baidu has more than 1.5 million links, and the number is increasing daily. . APE’s music has also been featured on the popular BT. All major BT downloads have opened a place for APE music download and communication, so users don’t have to worry about APE audio resources at all.

Apple Music lossless sound quality is not important?

Apple VP admits he “can’t hear the difference”

In an interview with Billboard, Eddy Cue, Apple’s senior vice president, admitted that he couldn’t actually hear the “fidelity compression” that Apple Music recently added, that is, the difference between lossless sound quality and the original AAC file. . But Cue thinks Apple Music’s lossless sound quality should still satisfy “a small group of users.”

Cue also believes that if he finds 100 people to test blindly, there may be 99 or 98 people, and it’s impossible to distinguish the quality of the Apple Music sound being played, whether it’s lossless or compressed. Cue noted that this has something to do with the fact that most people’s ears are “not that good” after all, after all, only a few people are gifted with hearing performance; In addition, to truly experience good lossless sound quality, additional devices such as an expensive stereo are usually required.

However, compared to the lossless performance and user experience, Eddy Cue highly praised the “spatial audio” that is upgraded with lossless sound quality. The musicians join in, even when the recording requires attention. Cue also announced that going forward, every new song added to Apple Music is expected to support spatial audio.

Eddy Cue’s statement may also explain that when Apple talks about this update to Apple Music, it’s actually talking about “spatial audio” in a larger space, rather than lossless sound quality. Apple officials also said “spatial audio” will permanently change the experience of streaming music.

Can a human tell the difference between lossless and lossless music? Part 2

Answer 2:

First, let’s talk about point of view. There is definitely a difference between lossless music and lossy music. There are many factors that affect whether you can hear it. The audio source format, decoding, amplification, line and playback equipment. all can affect the playback effect, generally speaking.

Personally, if you give me a random set of listening gear and let me listen to some songs I’m not familiar with, in this case I really can’t hear the difference between 320K and lossless. But if you let me use my own listening device to listen to the evaluation tracks that I’m normally familiar with, I can basically make a good guess. Physiologically, this shouldn’t be scientific, but actually I did. That’s why I said that there are many factors that can influence people to distinguish between lossless and lossy.

To give another example, many well-known tuners are over 50 years old and their hearing range is much less than some young tuners, but these older tuners have very good tri-frequency handling and can tune very well. sound equipment So, in a way, whether you can hear the difference between lossless and lossy has a lot to do with personal experience and competition.

Answer Summary:

Lossless audio refers to “lossless sound format data”, which only compresses the amount of data, but not the quality of the sound. Compared to lossless audio, lossy audio loses some information. It is mainly compressed by reducing the audio sample rate and bit rate, and the output audio file will be smaller than the original file.

Can a human tell the difference between lossless and lossless music?

I think to answer this question, we first need to figure out what is lossy and lossless music.

First of all, it should be noted that the lossless music we talk about is often lossy in theory. Because the music recording is converted into an audio file, it must be converted, and there must be data loss in the process of digitizing audio, so in fact, the lossless we usually say is actually lossy.

So what do we generally mean by lossless and lossy?

Lossless refers to “lossless sound format data”, which compresses only the amount of data, but not the quality of the sound. Compared to lossless audio, lossy audio loses some information. It is mainly compressed by reducing the audio sample rate and bit rate, and the output audio file will be smaller than the original file.

So what does lossy audio lose? Lossy audio mainly loses the high-frequency part of the audio. Theoretically, the hearing range of the human ear is 20~20000HZ, but in fact, each person’s hearing range is different. Some people may have a hearing range of 20~19000HZ, which is sensitive to high frequencies. Others may have a hearing range of 20~16000HZ. It is not sensitive to high frequency sounds and is completely inaudible after a certain frequency.

Is there really a big gap between lossless music and normal music? Part 3

First understand the concept:

Lossless music is the equivalent of lossy music. The so-called distortion compression means that by reducing the audio sample rate and bit rate, the output audio file will be smaller than the original file.

Lossless music is naturally not compressed. For example, it will not improve the sound quality of music by reducing the audio sample rate and bit rate.

In fact, we can already see the difference between them, the most important being the difference in sound quality:

The standard sound quality is 2.8M.

Lossless sound quality is 20.1M

The difference between the two is about 10 times. This difference is relatively large, which also leads to different sound quality effects when listening to audio.

Is there really a big gap between lossless music and normal music?

In fact, we can also perceive different characteristics:

Lossless music can reach 1411Kbps bit rate, which is more original and can retain all details of music. Ordinary music is severely compressed at 128 KB, which makes the following differences between lossless and lossy:

Is there really a big gap between lossless music and normal music?

A lossy track has a lower waveform, while a lossless track has a higher waveform, and that’s the difference.

For most consumers, it doesn’t matter if it’s lossy or lossless, as long as they can hear.

Is there really a big gap between lossless music and normal music?

1 The general lossless suffix is ​​called flac wav format (of course there are many uncommon formats)

Common music suffixes are mp3 aac wac ogg these four.

2 Lossless music files are 4 to 30 times larger than ordinary music (size is determined by different lossless formats)

For example, after downloading an ordinary 3 minute music, the volume of the mp3 is about 4m. If the flac is downloaded, the lossless sound quality is about 18 and the lossless wav is about 100m.

3. Lossless is much better than normal sound quality. It is close to the original sound of the recorded scene, and the stereo playback is clearer and louder.

This is unavoidable, otherwise why is lossless music so great?

The following is a normal mp3 audiovisual

Is there really a big gap between lossless music and normal music?

For a person who pursues sound quality, it must be very big.

I didn’t even want to hear it as long as it wasn’t damaged.

However, lossless music is not just a lossless sound source that can achieve perfect sound quality. A lossless music must be combined with good playback equipment such as HIFI, good headphones or audio equipment to fully shine.

In fact, when we use ordinary mobile phones or MP3, we don’t really feel it, but if you listen carefully, there is still a difference. The vocals and accompaniment are distinct, and the sense of hierarchy is relatively strong, so if you have so many requirements for sound quality, the memory of the mobile phone or MP3 is large enough, or if the traffic is sufficient, it is a lot better play lossless music

Is there really a big gap between lossless music and normal music?
tuner
2019-07-24 21:31:29
Is the gap between normal music and lossless music really that big?

I will answer this question.

The answers from the older ones above were too professional, and the younger brother has no talent, so I’ll answer in simple words.

First of all, when producing music, it must have lossless sound quality, and its file size is also very large, usually in the tens of megabytes. We call music in this format lossless music. Just like music creators. Due to the large file size, the transmission speed of the network will slow down during the day, and the popularity of the music will also slow down. Second, large-capacity files will consume more disk memory, especially in mobile phones, and other software, photos and videos need to be installed, so everyone expects a music file to be as small as possible.

Because of this, there is now ordinary music, which is called compressed music, its function is to erase all the content that is inaudible to the human ear in lossless music.

Is there really a big gap between lossless music and normal music? Part 2

In many cases, the recording quality of the source is more important than the bit rate.

If the recording quality is poor, even distortion-free compression will not provide a good experience. The quality of the recording depends on the performance of the performer/singer, the studio environment, the recording device, the operation of the recording engineer, etc., and this requires good planning and management. Any problem in any link will affect the quality. from the sound source. Among the music files that I have experienced so far, the music files produced by the German DG record club and the Chinese record club are of high quality, and many record clubs have experienced quality problems.

All early recording came from analog methods, and digital recording only became popular in the 1980s. But there are some legendary performances/songs in history that are dead and can only be re-recorded digitally. For example, the AAD sound source, its own sound range data has been lost during performance and recording, and the lossless file storage will be no different than 256k. Personally, I think only DDD audio sources have the value of existence of lossless files. And if there is a problem with the production quality of the music file itself, the higher the fidelity of the music file, the bigger the problem.

In the end, the content of the music is much more important than the format of the music file. The nutrients we get from listening to music are not lost due to differences in music file formats. As we strive for perfection in music, it makes sense to search for the perfect music file for greater expressiveness.

Is there really a big gap between lossless music and normal music?

First set a flag: Can you hear the premise of lossless and ordinary ~ your headphones can make a difference between them?

Let me give you an unprofessional answer: you can hear it, but you can’t hear it. Everything is conditional. Lossless sound recording is nothing more than a sample rate issue. No matter how high the frequency is, you can’t restore the truth~~ This is a recording. Next, let’s talk about the output after the recording is complete ~~~ speakers. Different speakers are like different sizes of the same mobile phone screen with the same dot matrix size. The same video on iPhone 4s and iPhone 8 plus needs to be corrected for its physical resolution. It is impossible to add more details to the screen. Playing very clear video on ip8s will definitely lose a lot of detail on ip4s. In contrast, a video that exceeds the viewing limit is actually the same when displayed on the same device. To say that you can listen to normal and lossless forerunners is that your headphones can make all the difference between them. It is not like this? Not that you can hear it. Many people say that lossless and ordinary can’t tell the difference~~ Ha ha. Because it’s indistinguishable from your device~~ How can you not hear the difference?

Is there really a big gap between lossless music and normal music?

I personally think there is a big difference

I just bought the Sony A55HN recently, and all of the following tests were heard with the a55 and its included headphones. Blind listening method: put the two sound quality files of one song into a folder, then let my friend press the next song a random number of times, listen to A first, listen to B after listening, then listen to A, then say A High or low sound quality.

I heard it twice:

First time was MP3 (320k) format downloaded from NetEase Cloud compared to FLAC (48khz/24bit) format purchased from Mora

The second time was the “lossless” FLAC format (44.1khz/16bit) downloaded from Netease Cloud, which also compared the FLAC format (48khz/24bit) purchased from Mora.

I listened to 2 songs in total, and the results were obvious 4 times. When I listened to A for the second time, I could tell within 10 seconds if it was normal or lossless.

Even if Dafa’s dsee hx is on, you can still hear the difference.

Is there really a big gap between lossless music and normal music?

Music that is listened to or downloaded online is generally divided into various grades: smooth, high-quality, high-quality, and lossless.

These different grades of music are all digitally encoded, but the encoding format is different. As a 3 minute song, the smoothness is only 1-2M, and the loss is up to 20M. Therefore, different music formats have different amounts of information and different sound quality.

With a low-end music player, such as a mobile phone, the difference between smooth and lossless is not obvious, but with a slightly higher-end music player, you can hear the difference.

Is there really a big gap between lossless music and normal music?

Under the conditions of the same playback device and the same audio source, the quality of lossless music files is better than that of distorted compressed music files, but the difference depends on the format of the music file. My own experience is that a 320k bitrate distorted compressed mp3 file is about the same as lossless, and looks a bit dull in the very high register, which occasionally happens on big band recordings. A 256k mp3 file doesn’t have a noticeable effect on small bands or singing. 128k mp3 files are good enough for pop songs, but the sound starts to muffle. 96k mp3 files have no problem hearing the voice, such as Mr. Hou Baolin’s cross talk.

Lossless sound quality, is it a tax on IQ? Do I feel like I can’t hear any difference at all compared to normal sound quality?

Lossless sound quality, is it a tax on IQ? Do I feel like I can’t hear any difference at all compared to normal sound quality?
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The difference between lossless sound quality and ordinary sound quality
First, the so-called lossless sound quality generally refers to the compression of CD records into ape and flac format files. When this compressed music file is uncompressed and played by the player, it can reproduce almost full CD direct playback sound quality.

Second, to ensure a higher compression rate, the normal sound quality has been cut at some high frequencies. The human ear is not sensitive to high-frequency sounds, and after reaching a certain frequency, it is completely inaudible.

What is the difference between lossless music and normal music? Answer: Lossy audio primarily loses the high-frequency components in the audio. However, due to the characteristics of the human ear, it may not be possible to hear the difference.

First of all, I am not a music enthusiast, nor do I play lossless music, I usually listen to songs from time to time, and they are also normal MP3s. However, I know a bit about lossless music and have read some articles about lossless music, so what I said below, if I’m wrong, please advise me:

First let’s talk about the bottom line: 1. Lossless sound quality is not a tax on IQ, it has its real meaning and value 2. You don’t feel any difference from normal sound quality, whether you listen to popular music, especially popular songs, or really lack The quality of music enthusiasts, of course, can not tell the difference.
Let’s briefly talk about the so-called “lossless” and “lossy” problems of music files:

1. Except for live music or concerts, there is no absolute lossless music in the world.
I’m not going to talk about those who are too professional. In fact, I don’t understand it myself. I will only speak from my experience after learning. That is to say, in a song or in a piece of music there are many details that you cannot hear if you do not go to the concert hall or even approach the band, details of the process, etc. Mariah Carey sang a “Hero” on stage, some of her breathing, her inhaling, and some excessive vocals, and her preparations when she sang the dolphin sound Sounds, etc., maybe you can’t hear it if you don’t you do. Don’t lie on the edge of the stage. For concerts or professional recording production, the equipment is very advanced, so it can be recorded very close to the actual scene, but it can be said that this recording process, no matter how advanced the equipment or professional-level recording , can not be exactly the same Full acoustic recording, at this level, as long as you listen to music or songs other than live concerts, there is absolutely no lossless music