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M4a and mp4, what features do they have?

M4A

.M4a file extension

M4A

Category Music File

Description M4A files are a type of audio file developed and advanced by Apple. Since 2007, music purchased through the iTunes store has been in the m4a format, so there is great confusion of more than 15 billion files worldwide. MP4 and M4A are two very similar formats, based on the MPEG-4 codec. However, M4A is a file that only contains audio, while MP4 can also contain video.

Technical details M4A files outperform MP3 in terms of compression scale and sound quality. The M4A file uses the Apple codec and is the home of MPEG-4. The main advantage of M4A is that the files are compressed but lossless. This means that they can be decoded to their original quality. Another advantage of M4A files is the lack of digital rights management (DRM), which means they are less restrictive.
Associated programs Apple QuickTime Player
Apple iTunes
Microsoft Windows Media Player

Mimica audio / mp4a-latm type

.Mp4 file extension
Category Video file
Description MP4 files (MPEG-4 Part 14) are multimedia files. MP4 is a format that can store video, audio, and subtitle data (depending on content). Since stores like iTunes have been using this format, and it is used with iPod and PlayStation Portable (PSP) files, MP4 files have become more common.
Convert MP4 file behavior

Technical details MPEG-4 Part 14 or MP4, formally ISO / IEC 14496-14: 2003, is a multimedia file format called Part MPEG-4. It is most commonly used to store digital video and digital audio streams, especially those defined by MPEG, but it can also be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. A separate track is used to include sequence information. The only official file extension for MPEG-4 Part 14 is .mp4.
Associated programs Apple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
VideoLAN VLC Media Player
Designed by Group of Experts in Moving Images
Mimica audio / mpeg type

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M4a, what you should know about m4a

M4A

The M4a is, we could say, the audio part of what would generally be a Mp4. That is, a Mp4 that only contains audio information, it would be said that it is a m4a.
Since the Mp4 can contain, among other things, audio and video channels, but if it only contains audio, it was a m4a.

Initially the m4a as such did not become very well known. And it wasn’t until Itunes and the Ipod made it popular.

The M4a can also be used as a ringtone on iPhone phones.

Normally it is known that its decoding delivers a file with the same quality as the one that was originally encoded, that is, the M4a is of very high quality. Which is why it has gained a lot of popularity in recent times.

In addition to encoding without loss of quality, it encodes to save in very small spaces, which is another advantage that has brought them great popularity.

You can even compress or decompress at the same speed as mp3, and using the same bit rate as mp3 will take up less space than mp3.

One disadvantage, the most important, is that there are not so many devices capable of playing it compared to mp3, which is still the most widely used.

We could say that on a planet in which there are more devices than people, most of the users are not experts and then they will turn to the mp3, since it sounds good enough, it is the one that practically everyone can reproduce and even with easier to use. get, they are practically everywhere.

The M4a will then remain, at least until now, for the experts.

When using ALAC compression for the M4a, its highest quality is achieved, as there is really no loss of quality when compressing.

We have already mentioned in other articles that 95% of people cannot distinguish this difference.

However, the M4a has been gaining ground as people find out about its high quality. Not all software is capable of processing it. Luckily the Mp4Gain is able to normalize this format without any problem.