![\"Lossy](\"https:\/\/image.slidesharecdn.com\/audioencodingprinciples-130922131906-phpapp01\/95\/audio-encoding-principles-4-638.jpg?cb=1379856037\")
<\/p>\nFirst of all, let’s understand why music should be compressed.<\/p>\n
Uncompressed files like AIFF and WAV take up a lot of space. This causes that it is not comfortable to transfer them on phones or players, or even store them on the hard drive of our computer.<\/p>\n
<\/p>\n
Even trying to send them online would be very difficult, due to their large size.
\n,
\nThis has forced the creation of various formats of audio files that take up less space. Of course, the important thing is that they sound practically the same as the original, although they take up less space.<\/p>\n
![\"lossless](\"https:\/\/image.slidesharecdn.com\/uncompressedlosslesslossy-140312172017-phpapp02\/95\/uncompressed-lossless-lossy-audio-2-638.jpg?cb=1394644852\")
<\/p>\n
This is where compression enters the picture.<\/p>\n
On the one hand, ZIP or RAR compression is used, but it is not enough. So other techniques are used, namely:<\/p>\n
– An uncompressed file contains a lot of information about sounds (even silence) that is inaudible to the human ear and that information is discarded. With that one, it is possible to save a lot of space, since there is little point in occupying space in storing information about sounds that our hatred cannot perceive.<\/p>\n
-On the other hand, there is a perfectly known phenomenon regarding the human ear, which is based on the idea that if two sounds occur more or less simultaneously and these sounds occupy similar or close frequencies and one of them sounds louder, the ear You will NOT hear the less loud sound.<\/p>\n
This is other information that can also be discarded, since it is generally not audible or the brain does not process it.<\/p>\n
Once discarding both types of information, the file has been much less large and therefore does not occupy the same space.<\/p>\n
Practically what remains is to apply some composition algorithm, something similar to ZIP. And then you will have a compressed file, for example the mp3.<\/p>\n
This is called the lossy method.<\/p>\n
There is another method, without loss, where it is only compressed with a method similar to ZIP, but without discarding information.<\/p>\n
Is there really a difference between the two? Practically no. the human ear practically cannot distinguish between the two.<\/p>\n
A file with loss, that has a good sample rate (minimum 44,100) and a good bit rate, it is almost impossible to distinguish it from the original and therefore, from the file without loss.<\/p>\n
Many experiments have been done allowing people to listen to both types of files (those with loss and those without loss) and more than 90% have not been able to distinguish between them, as long as the one with loss has a good samplerate and a good bit rate.<\/p>\n","protected":false},"excerpt":{"rendered":"