The daughter, constantly listening to music through an mp3 player, asked: "What does mp3 actually mean?"
I briefly explained how the speaker works, converting sound waves into electrical waves, digitizing:
A smooth wave becomes a ladder, but if there are many steps in the ladder, then this is imperceptible.
Then he told about the fact that you can encode a ladder into a file in different ways:
We take a CD as a reference, this is a very decent quality, although now there are already better options, all sorts of High Resolution and Super Audio CD (SACD). If you rip the CD to a file on a computer or player, the files will be large. It can be packed, for example, in flac format. It will be less, but not much, 3-4 times. But the sound is good like a CD. And if you want even less, you have to degrade the quality, and now we come to lossy compression.
Explained about the psychoacoustic compression model used in mp3:
A quiet sound after a loud one hears badly - throw it out. Formally, people hear sounds up to 20 thousand vibrations per second *, but these are children, and with age, the ears get coarser. So we cut off everything that is above 18, or even 16 thousand. The more we throw away, the smaller the file becomes. You can't do this endlessly, at some point it becomes noticeable. You can get very small files with disgusting sound. But mp3 320 quality is considered good. In order to distinguish it from a CD, you need high-quality equipment and a musician's ears.
And then the daughter says: "Well, I have musical ears. Let's try to compare."
It seemed interesting to me. We tried it.
Ears by ears, and the equipment we had, of course, was awful.
. Hi-Fi , ? , .
Sennheiser Momentum 2 3. AptX. , , , . , fun listening, .
, , 15- Sennheiser HD 555. . , .
? . . , , 3 , . FiiO X1 3- , High Resolution, . , mp3, , . .
Lover . , - Dream Theater, .
, , , , .
: . , " ".
mp3 320 kbit flac CD . , mp3 320 kbit flac , - , mp3 128 kbit, " cd", 90. . .
:
, , , , , . , , . , .
. Flac mp3 320 . , . , . , .
HD 555 Momentum .
Phenomenal. Perhaps, you need to rewrite your music collection on flac / CD or even SACD rips, I have a lot of mp3s. Don't give a damn about the place, flash drives are now worthless.
And yes, it must be a shame, but I liked Taylor Swift.
* we will not ship the child with hertz.