Category: Audio and video

Advantages and disadvantages of popular audio formats


Free Download Mp4Gain
picture

Advantages and disadvantages of popular audio formats

Audio File Formats

In today’s music world, there are a large number of audio file formats that are often confusing to the unprepared user. To understand all this, to find out what they are and what they are used for, the presented review will help.

Audio formats

Types of audio formats

Today is the time when all music lovers, not to mention professional musicians and audio editors, need to understand concepts like audio file formats, bit rates, extensions, bit depth, sample rate and many others. to achieve high quality sound. Sound has gone digital, which means that it can be used for various purposes, eg for listening to evidence, for presentations, video dubbing. In fact, digital sound, like an image, is a collection of individual pixels, and the more there are, the better the sound image. This “pixelated” sound can be edited and processed.

An important role in evaluating the quality of audio formats and consequently sound quality is a parameter such as bit rate, which shows how many bits or kilobits it takes to record one second of sound. Low bit rates mean low quality sound, high bit rates mean high quality sound.

But for the storage and further use of audio in one form or another, audio formats are used – digital recordings of audio data. We can say that the format is a kind of container where the sound is stored. Virtually all audio formats can be divided into two broad categories: lossless compressed and lossy compressed.

No loss, no loss

To avoid as much as possible a decrease in sound quality during the compression of an audio file, special methods have been developed to store audio information, avoiding losses, which in fact can be compared with the file when the information is simply packed in a zip file, the size of which is noticeably smaller than the original data. Later, this data can be clearly restored on each bit. And the bitrate itself is not important for these files. These audio files are collectively called Lossless, Music As Is. These algorithms allow you to compress files two to three times. As a result, the size becomes quite large, but at the same time the original sound is preserved.


Free Download Mp4Gain
picture


Mp4Gain Main Window
picture


Mp4Gain Features
picture


Free Download Mp4Gain
picture

What is the best digital video format?

What is the best digital video format?

Digital File Formats

Digital video is increasingly included in our lives, and if a few years ago users were limited to watching movies and videos on the Internet, now these same users create video content themselves, and in quantities that not even film studios Hollywood could dream. Private video clips have filled the social networks Vkontakte, Facebook and now Instagram, YouTube video hosting is packed with newly created video channels and gigabytes of video uploaded to them.

Digital Video Formats

Thanks to modern devices and software, working with video has become as easy as possible: editing, pasting, layering sound, as well as converting from one format to another, all of this is now done literally in a few clicks and does not require the user has extensive knowledge of the technical part of the process itself. … Maybe yes, which requires a little excursion, then these are video formats like MP4, AVI, WMV, MOV, as well as MKV (M2TS). Next, we will talk about what a video format is and take a closer look at each of them.

What is the video format?

The video format is the structure of the video data, how it is stored on the memory card, and with which video codecs it is encrypted. Depending on the format: MP4, AVI, etc., the structure of video files may differ significantly from each other. The structure is a container for the separate storage of audio, video, and text data, as well as service metadata. Some video formats, in their structure, can store several audio or video tracks, with different quality and sound. When watching, using a video player, the user can select one or another track to play (for example, in Russian or English).

video file structure

All data, both audio and video, is encoded with special audiovisual codecs, for example AAC and H.264. Depending on the quality of the sound and video, the size of the file, as well as the resource requirements of the device on which the file is played, may change.

Let’s look at various video formats and find out which video format is better, for this we will compare video formats on three parameters: quality, processing (playback) speed, and video file size. Also, before proceeding to the comparison, it is worth noting that you can always convert videos from one format to another using Movavi Video Converter.

All video formats

AVI

The oldest presented format is a Microsoft development, supports multi-stream audio and video, can contain data encoded by various video codecs. The main advantage is video playback on low-power devices, achieved due to the low compression ratio, from which the second advantage arises – good quality. But the size of the video file leaves a lot to be desired.

Video processing speed: 8 points (high);
Video file size: 1 point (low score);
Video quality: 8 points (good).

MP4

It stands for MPEG-4 Part 14 and it is one of the most common formats. Today it is difficult to find a video device or video application that does not support this format.

Video processing speed: 6 points (average);
Video file size: 6 points (average);
Video quality is 7 points (above average), while viewing it, you may notice “apostrophes”, changes in shadows and contrast.
Overall rating of 19 points.

WMV

Another Microsoft development, the format that replaced AVI at the time, is proprietary and used only in the Windows operating system, but it is also quite widespread. The main advantages are the small file size and high video quality, while this format is quite demanding on device resources due to the high degree of data compression.

Video processing speed: 2 points (average);
Video file size: 8 points (average);
Video quality is 8 points (above average), during viewing, you may notice “apostrophes”, changes in shadows and contrast.
The total score is 18 points.

conclusion

We found out what video formats are, what they are and what they consist of, and we also examined some of them, comparing them in more detail based on three main criteria. In the benchmarks, the title of the best video format to date is MP4, with an overall rating of 19 points. Acceptable video processing speed, good quality and average video file size. Obviously, it is thanks to these qualities that this format has gained such popularity among users. So, if you have AVI video that takes up a lot of hard disk space, you can safely convert it to MP4 using Mp4Gain.

Full HD resolution: what it is and how it differs from HD

Full HD resolution: what it is and how it differs from HD

FULL HD vs HD

When choosing a modern TV, they look at technical characteristics, screen resolution, diagonal, support for 4K or Full HD. Regular users turn a blind eye to the last parameter. They have heard that this is something related to quality, but they don’t understand much exactly what the advantage of this level of quality is.

full hd vs hd

full hd resolution

Let’s take a closer look at what is Full HD, Ultra 4K HD. What is the difference between the two quality formats? And with what parameters it is better to choose televisions.

Full HD story

Resolution is a parameter of the image transmitted to the screen. It is measured in points, pixels. The higher the score, the better the quality and detail. Modern TVs support HD and Full HD resolution. The first format starts at 720 by 576 pixels.

Modern resolutions are being standardized. That is, they have exact parameters that manufacturers do not deviate from. So the HD resolution is 1280 by 720 pixels. Full HD revolutionized the standards in 2007 with 1920 x 1080 pixels.

how is full hd different from hd

In addition, there is an amorphous standard Full Sd with parameters of 1140 x 1080 points. The pixels are not square in this case. In regulatory documents, this version of the standard is called HDV.

Interesting fact. The first feature films on BluRay and HD DVD were released in HDV format.

Modern quality

The modern definition standard (SD) is 720 by 576 pixels. Old Full HD format: 1280x720p. And this type of detail refers to high definition. The updated version is 1920 x 1080 pixels. And at the same time, there are 2 subtypes of the new 1080 format: progressive, interlaced.

Full color 1080p progressive subtype features instant video output. In other words, the frames are not fed sequentially, which helps prevent the appearance of the comb effect and preserves the maximum detail of the image.

In addition to the good picture, the popularity of Full HD is due to the following factors:

Devices with matrices, whose resolution is compatible with 4K or 8K, cost several times more.
The 1080p picture parameters are sufficient for high details of small objects even on modest 110 screens.
Image clarity in 4K and above is not intended for home viewing. Until now, this format is used in full-scale cinemas. Not all televisions support this format.
Even when you watch cable and satellite TV, movies are broadcast in HD or Full HD quality, it is almost impossible to see the UHD parameter. Ultra-HD movies are only available in very expensive TV packages.

Advantages and disadvantages of 1080p quality
Modern picture details allow you to view long-term movies in very good quality. Full HD resolution is installed in all modern televisions. It has the following advantages:

full hd or hd which is better

Large options. The image is located in an area of ​​1980 by 1080 pixels. These dimensions are enough to cover even the largest screen with an image.
The availability of equipment with this parameter. Even domestic manufacturers produce 1080p televisions. Foreign TVs Samsung, Sony, LG are equipped with the same modules.
A lot of content in this capacity. Advertising, television and Internet videos are supported in the full-size video format.
Full software compatibility with older CD versions. Even a simple video in HD 720px is perceived by modern technology as Full HD, in the H.264 video codec.
Despite all the advantages, modern quality has a drawback: too much information requires a very high speed of work. If something is playing from the Internet, the connection must be high speed.

Misconceptions about digital audio

Misconceptions about digital audio

Digital Audio

The higher the bitrate, the better the track

This is not always the case. For starters, let me remind you what bitrate t (bitrate, instead of bitraid). In fact, this is the data rate in kilobits per second during playback. That is, if we take the size of the track in kilobits and divide it by its duration in seconds, we get its bit rate, the call. File-based bitrate (FBR), usually not too different from the bitrate of the audio stream (the reason for the differences is the presence of metadata on the track: tags, “embedded” images, etc.) .

Digital audio

Now let’s take an example: the uncompressed PCM audio bit rate recorded on a normal audio CD is calculated as follows: 2 (channels) × 16 (bits per sample) × 44100 (samples per second) = 1411200 (bps ) = 1411.2 kbps … Now let’s grab and compress the track with any lossless codec (“lossless” – “lossless”, that is, one that does not lead to data loss), for example, the FLAC codec. As a result, we will get a lower bit rate than the original, but the quality will remain unchanged; here is your first rebuttal.

Something else is worth adding here. The lossless compression output bitrate can be very different (but is generally lower than uncompressed audio); It depends on the complexity of the compressed signal, or rather on data redundancy. So simpler signals will compress better (ie we have smaller file size for the same duration => lower bitrate), and more complex signals will be worse. That’s why lossless classical music has a lower bitrate than, say, rock. But it must be emphasized that the bit rate here is in no way an indicator of the quality of the sound material.

Now let’s talk about lossy compression. First of all, you need to understand that there are many different encoders and formats, and even within the same format, the encoding quality for different encoders can differ (for example, QuickTime AAC encodes much better than outdated FAAC), not to mention the superiority of modern formats (OGG Vorbis, AAC, Opus) in MP3. Simply put, from two identical tracks encoded by different encoders with the same bit rate, some will sound better and some will sound worse.

Also, there is upconversion. That is, you can take a track in MP3 format with 96 kbps bit rate and convert it to 320 kbps MP3. Not only will the quality not improve (after all, data lost during the previous 96 kbit / s encoding cannot be returned), it will even get worse. It’s worth noting that at each lossy encoding stage (at any bit rate and any encoder), a certain amount of distortion is introduced into the audio.

And even more. There is one more nuance. If, say, the bitrate of an audio stream is 320 kbps, this does not mean that the 320 kbps was spent encoding that very second. This is typical for constant bit rate encoding and for those cases where a person, hoping to get the highest quality, forces a constant bit rate too high (for example, setting CBR to 512 kbps for Nero AAC ). As you know, the number of bits assigned to a particular frame is regulated by the psychoacoustic model. But in case the allocated amount is much lower than the set bitrate, even the bit deposit is not saved (for terms see the article “What is CBR, ABR, VBR?”) – as a result, we get useless “zero bits” that simply “wrap up” the frame size to the desired one (that is, increase the size of the stream to the specified size). By the way, this is easy to check: compress the resulting file with a filing cabinet (preferably 7z) and look at the compression ratio – the more, the more zero bits (as they lead to redundancy), the more space wasted.

Lossy codecs (MP3 and others) can cope with modern electronic music, but cannot efficiently encode classical (academic), live and instrumental music.
The “irony of fate” here is that, in fact, everything is the exact opposite. As you know, academic music in the vast majority of cases follows melodic and harmonic principles, as well as instrumental composition. From a mathematical point of view, this leads to a relatively simple harmonic composition of the music.

Advantages and disadvantages of the Mp4 format

Advantages and disadvantages of the Mp4 format

MP4 FORMAT

In this article, I will introduce you to a video format like – mp4. Next, you will learn about all the advantages and disadvantages of this format, as well as the characteristics of working with video.

Mp4 Format

The mpeg4 video standard, the development of which was completed in 1998, was aimed at the transmission of multimedia files, first of all, video over channels with little bandwidth.

Why is mp4 attractive?

Why do personal computer users like mp4 so much? First of all, because of the low weight of the video files and acceptable for viewing, the recording quality. For example, by reencoding a DVD movie to MP4, it is possible to reduce its size from 4 gigabytes to 700 MB. This feature made mpeg4 the most widely used format for streaming video over the Internet. There are three main uses for the MP4 format: interactive media, graphics applications, and digital television.

Advantages of mp4

I’m sure you are probably interested in what influences the quality of mpeg4 video. I will immediately make a reservation that there are many factors here, so it would be more convenient to separate them into three main categories: the quality of the original video, the compression parameters and the technical characteristics of your computer.

The quality of the source is very important, for example, the original video is low resolution, and as a result, the poor quality cannot be transcoded to the mpeg4 format with a significant increase in the output quality.
Compression parameters should be understood as the size of the bit rate, the desired image spread, and the frame rate per second. It is not difficult to guess that with the minimum parameters, the file size will be minimal and the quality is unpleasant.
The technical equipment of the computer on which the video will be played is very important. So on very weak machines all video defects (image shake, dropped frames) will be more noticeable.
disadvantages
The disadvantages of the mpeg4 format include the lower video and sound quality compared to the DVD format. However, don’t forget that DVD video size is much larger compared to mp4. Sometimes mpeg4 video can be unpleasantly pleasing as it progresses through a slow color transition or squares in the presence of “broken” frames in the sequence.

Nowadays, video clips in mpeg4 format are ideal as demonstration material for customers. This plugin allows you to save videos not only in mp4 format, but also in mpeg 1 and mpeg 2. If necessary, a video file in mp4 format can be easily re-encoded into any other file using special programs.

AVI, MP4 or WMV video: which is better?

AVI, MP4 or WMV video: which is better?

Best Video Format

Today we are going to act as devil’s advocate and conduct research with passion and using special media against the three most popular video formats: AVI, MP4 and WMV.

Best Video Format

To begin with, it is useful to clarify concepts about formats. In general, a video file format is a container that contains data and codecs, that is, programs for compressing and retrieving information.

A container is like a toolbox. Depending on the internal volume and available compartments, a tool kit can contain certain instruments, in one quantity or another. That is, in a small and ill-conceived suitcase, except for a wrench and a bottle of kefir, nothing will fit.
Codecs are information processing tools. There are codecs with a high compression ratio, but with lower quality of the output content. Yes codecs with less compression and higher image quality.
As you can imagine, different codecs can be put into a container if so provided by the container’s own format.

An AVI container can contain many audio streams and different types of codecs for video compression.
The MP4 container has been specially designed for streaming videos online. It also supports multiple audio channels.
The WMV container is a product of Microsoft Corporation, which is always trying to create its own alternative to popular products. In many respects, the properties are similar to the other two, but with a higher compression ratio.
We won’t bore you with tables of numbers, but we will immediately inform you of the benchmark results in simple human words.

Comparison of the three video formats by consumer properties
Overall, based on the test results, it was clear that we wasted time on these tests. Everything turned out to be roughly the same, as could be speculatively predicted based on the theoretical descriptions of these three video formats on Wikipedia.

AVI

This format uses the lowest compression rate codecs. So this is what:

Image and sound output of the highest quality.
The fastest file processing speed when converting original uncompressed video material to this format. This is understandable, since compression is not particularly necessary, rendering is faster.
Larger finished file size.

MP4

The most common video format supports everything that only thinks in numbers. This time is useful for users who have many different types of devices in use on alternative platforms.

The compression ratio is higher than that of AVI. Thus:

The conversion takes about 1.5 times longer.
The size of the finished file is about half the size.
Regarding the quality of the visual range, in contrast there are certain sharp drops, not very pleasant to the eyes.

WMV

Note that this format is owned by Microsoft and is mainly supported on Windows platforms. There may be incompatibilities in other operating systems.

Higher compression ratio.
The file size is almost half that of MP
On the contrary, it turned out to be better than MP4, but the overall impression is worse: blur, lower image clarity.
The processing time of a file in WMV is the longest of the prototypes.
Who would doubt it.

Area of ​​application
Let’s proceed to the announcement of the verdict. Based on the evidence presented by the investigation, we can confidently state the following.

AVI

The AVI video format can be recommended for watching movies and music shows on large (relatively large) screens with multi-channel surround sound.

AVI quality is not sufficient for a video projector, even when projecting on a wall in a common apartment room.

But for a large-format computer screen, if you put the couch on the far side of the room and arm yourself with the battery from the Barley Ear, then it’s quite suitable for a pleasant evening.

Note. If a romantic evening is predicted, you can cheat a bit. Record the first part of the video program in AVI format, while the girl is still looking at the screen, and the rest of the video will be in WMV format, since no one is looking at the screen anyway :))

MP4

Optimal format for watching movies on tablets. For a vertical size screen, MP4 resolution is sufficient.

The quality of the MP4 format is believed to be optimal for uploading videos to YouTube channel as well.

Although, in all honesty, the video quality of the series on YouTube leaves much to be desired, if you refrain from stronger expressions. Actually, the video quality on YouTube is lousy.

For example, on the some websites, with the same traffic consumption, the quality is almost HD.

Is Vinyl Sound Better Than Digital Audio Formats?

Is Vinyl Sound Better Than Digital Audio Formats?

Vinyl vs Digital

True music fans want the best sound quality for their favorite albums and recordings, and with the return of vinyl, the debate over which is better (CD versus vinyl, digital versus analog) has only sharpened. Many people value vinyl not only for its clean playability and lack of digital sound processing during playback, but also for the very process of installing the record on the turntable and the ability to hold the record in your hands.

Vinyl Vs. Digital

Nowadays, it is possible to play tracks as often as musicians record them. They record music at frequencies above the standard 44.1 kHz (96 kHz or 192 kHz) CD recording rate for better sound quality. Many people in the audio industry say that they can see a noticeable improvement in quality with higher sample rates than CDs, which is why they prefer listening to high-resolution music.

When turntables take priority over other formats

There’s a reason the vinyl revival has taken place. Yes, there is a certain appeal when you can hold a recording in your hands, which is different than choosing digital tracks on the screen. But there is also the argument that vinyl sounds better than digital recordings, exactly as the musician intended. The main difference between a vinyl record and a CD and MP3 is that the record on the record is analog. It is a physical recording, represented by a continuous electrical signal that reflects a change in the sound wave that is fully consistent with the original sound.

Unlike vinyl, most digital formats are compressed during recording and playback to minimize file size, making it ideal for various devices and can easily be streamed over the Internet. Most streaming services simply won’t be viable without audio compression technology.

When compressed, audio files lose not only size but also sound quality. This means that the listener loses the smallest sound details that the musician wanted to convey when he recorded this track. For the average listener this may not matter, but for music lovers, losing this depth of sound is completely unacceptable.

However, in both cases, analog or digital, good sound always begins with a good recording and how the sound engineer created it. If mistakes were made from the beginning, this cannot be corrected during playback.

Vinyl provides a warmer, livelier sound

Vinyl fans always talk about the “warmth” they get from classic recordings. This is not nostalgia, but a very real sonic phenomenon. According to sound engineer Adam Gonsalves, vinyl provides a more pleasant and warmer sound to your ears. This is especially noticeable when listening to classic rock artists like the Beatles, Led Zeppelin or Pink Floyd.

In the 1990s, record labels struggled to make their records stand out from the rest. To do this, the sound was processed and compressed with special programs for greater saturation. But this digital sound processing not only increased the volume, it also noticeably spoiled the sound quality. Compared to those processed tracks, vinyl is just so much cleaner and better.

When digital formats win

There is an important caveat that vinyl sounds better in certain but not all circumstances, especially when modern music is digitally recorded in the studio. In this case, albums released on vinyl and digital have little or no difference in sound quality between them. In addition, there are high definition digital audio formats and SACD (Super Audio CD) formats that surpass vinyl in sound quality.

In terms of convenience, digital formats outperform vinyl. Streaming music from your smartphone or mobile device is infinitely easier and more convenient than putting on a disc and flipping the disc every three to four songs.

Ultimately, it is up to each listener to decide what is most important to listen to: the high sound quality of vinyl records or the convenience of digital formats.

If you want to hear your favorite classical composers in exactly the way the musicians and sound engineer wanted to convey it, vinyl is made for you. Be sure to check out today’s Denon turntables, amplifiers, and other hi-fi components to begin your journey to real sound.

What is MP4? Difference between MP3 and MP4

What is MP4? Difference between MP3 and MP4

Mp4 file format

MP4 files are just a newer and better version of MP3 files, right?

Well, no.

This one-digit difference may give the impression that they are more or less the same, but nothing could be further from the truth. Each has its own uses, history, and benefits, so let me repeat, MP3 and MP4 are not the same.

Mp4 format

In this article, we will explain some key differences that everyone should know about. When you finish reading, you will know exactly what type of file suits your needs.

Understanding MPEG
But before delving into the differences, it’s important to understand where the two types of files come from.

MP3 is the abbreviation for MPEG-1 Audio Layer 3. It was one of two formats considered for the MPEG audio standard in the early 1990s. Electronics firm Philips, French research institute CCETT, and German Institute of Broadcast Technology supported the format because of its simplicity, without errors and computational efficiency.

The decision was made in 1991 and the MP3 files were made public in 1993.

MP4 means MPEG-4 part 14. This technology is based on Apple’s QuickTime MOV format, but adds support for other MPEG functions. The file type was first released in 2001, but it is a 2003 reissue that is now widely used when viewing MP4 files.

Audio only versus digital media
The most fundamental difference between MP3 and MP4 lies in the type of data they store.

MP3 files can only be used for audio, while MP4 files can store audio, video, still images, subtitles, and text. Technically speaking, MP3 is an “audio encoding” format and MP4 is a “digital media container.”

MP3: King of Audio
Because they store audio so well, MP3 files have become the de facto standard

for music software, digital audio players, and music streaming sites. No matter what operating system or device you have, you can be sure that MP3s will work without any problem.

, which significantly reduces the size of the audio file, practically without affecting its quality. The process works by removing any data that is outside of the average person’s hearing range, and then compressing the rest as efficiently as possible.

MP3 files also allow users to find a balance between sound quality and file size.

If you are a music lover, you can choose a larger file size with a higher bit rate and better sound quality. On the other hand, if you want to include as much music on your portable device as possible, you can reduce the file size and sound quality accordingly.

Also, MP3s will always be smaller than equivalent MP4 files. If your audio player or smartphone fills up, you should convert any audio saved in MP4 format to MP3 format. Please note that it may affect sound quality in the process!

MP4: more options, more flexibility
MP4 files are “containers”: instead of storing the file’s code, they store data. So MP4 files don’t have their own way of handling file encoding. They are based on specific codecs to determine how encoding and compression will be handled.

There are hundreds of codecs on the market today, but not many will work with normal MP4 players. For a player to be able to read and play an MP4 file, it must have the same codec. Most supported codecs:

video: MPEG-4 part 10 (H.264) and MPEG-4 part 2.
audio: AAC, ALS, SLS, TTSI, MP3 and ALAC.
Subtitles: MPEG-4 synchronized text.
These codecs give MP4 much more flexibility than MP3. For example, M4A files (which are MP4 files that only contain audio) can handle both Advanced Audio Coding (AAC) and Apple Lossless Audio Coding (ALAC). The choice of quality is up to the user. Either way, the file will appear as an MP4 file, but the data in that file will vary greatly.

Also read: How do browsers process web pages and why don’t they look the same?
Besides audio, MP4 files can also contain video, images, and text. You will often see multiple file extensions indicating the type of data in the container. Some of the most common are:

MP4 – the only official extension.
M4A – Unprotected sound.
M4P – Audio encrypted by FairPlay Digital Rights Management.
M4B: audiobooks and podcasts.
M4V: MPEG-4 visual bitstreams.

Understand file metadata

MP3 and MP4 files support metadata. Without it, it would be impossible to use music player applications effectively.

MP3 files use ID3 tags

, They allow information such as song title, artist, album, track number, and even album art to be stored in the file. Tags are stored at the end of the file code; its content is retrieved by decoders or ignored as unnecessary non-MP3 data.

Other relevant information, such as ReplayGain data or DRM restrictions

it can also be stored in metadata.

MP4 files can implement metadata in the same way as MP3 files, but they also represent the Extensible Metadata Platform (XMP). XMP metadata works well for the MP4 container format due to its support for a large number of file types, including PDF, JPEG, GIF, PNG, HTML, TIFF, Adobe Illustrator, PSD, WAV, and PostScript.

MP3 and MP4 in a nutshell
I have tried to give you a balanced view of the two file types without being too technical, and hope that you now have a clearer understanding of the two formats.

Therefore, if you are saving audio for use on portable players, you must use MP3. If you want to save videos or stream your content over the Internet, you must use MP4.

Sound quality

Sound quality

Sound Quality

Although sound quality can be objectively measured with special instruments and devices, most people do not have such tools or knowledge to use them. To some extent, quality can be judged subjectively, but this is not a reliable method. This article will help you decide what to focus on in terms of sound quality.

Sound Quality

MP3 is one of the most popular audio formats and a significant part of music is stored / distributed in this format. It is a lossy audio compression format, which means that the MP3 copy is slightly worse than the original. Some parts of the audio information are discarded when converting audio to MP3. Like other modern lossy audio compression formats, it uses what is called “perceptual encoding.” This method mainly discards audio data that the human ear cannot pick up.

The main advantage of all lossy formats is the small file size (compared to lossless formats). Due to “perceptual encoding”, this does not always mean that “lossy” files sound worse than “lossless” files. An MP3 file with a decent bit rate and frequency can only lose inaudible information. However, it should be noted that ear sensitivity is different for different people, so “inaudible” is a relative property.

An MP3 file has three main parameters: number of channels (stereo, mono, and joint stereo options), frequency (sampling), and bit rate. Stereo MP3 files of 44 kHz and 128 kbps are considered “sufficient” for music (at lower bit rates and frequencies, the quality decreases too much), but 192 kbps and more are recommended. Using bit rates higher than 320 Kbps is pointless as the size of such files is close to the size of “lossless” files, but compression is still lossy.

Lossless compression formats retain all the information in the original audio file, which means that they are identical copies of the audio. On the other hand, they are larger (sometimes significantly larger) than the same audio in lossy formats. Examples of lossless audio compression formats: FLAC, APE, WAV, MPC, etc.

For backups, lossless compression formats are the best option. Lossy formats are ideal for portable devices – the smaller file size allows you to store more songs in the limited space of the device. Although some portable players support lossless formats, the use of such formats on such devices is rarely justified.

It is possible to convert from lossy to lossless format, but we will get large files with the same quality. Even though this kind of conversion doesn’t make sense, at least it won’t do any harm. As another example, we can consider converting a 128 Kbps MP3 to 320 Kbps. In this case, we not only get large files, but also of poorer quality. Remember that MP3 is a lossy audio compression format, which means that every time we convert to this format, some of the audio data is discarded.