{"id":2627,"date":"2020-11-28T20:46:59","date_gmt":"2020-11-28T20:46:59","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=2627"},"modified":"2020-11-28T20:46:59","modified_gmt":"2020-11-28T20:46:59","slug":"how-digital-sound-works-part-1","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/how-digital-sound-works-part-1\/","title":{"rendered":"How digital sound works. (Part 1)"},"content":{"rendered":"

How digital sound works. (Part 1)<\/strong><\/p>\n

\"digital<\/p>\n

In this post, I’d like to talk about digital sound and, along the way, expose such a popular form of freestyle as audiophilia.<\/p>\n

\"Digital<\/p>\n

Unfortunately, lately I see more and more manifestations of this phenomenon, penetrating the minds of even quite reasonable people and causing them to spend money on technological analogues of homeopathic pills. I say “sadly” because everything that I will write in this article should, in principle, be known to all the people who graduated from school. But for some reason that I do not understand, they forget or do not want to apply in practice the knowledge they once acquired. The belief in audiophilia at this point has even penetrated and spread widely among engineers, although that’s really who, and they should understand these things thoroughly.<\/p>\n

I originally wanted to write this article in a more aggressive style. But in the end I decided that it would be better for me to do without curses and provocations. On the contrary, I really hope that audiophiles read this article and reflect on what they believe and if they have enough reason to believe. Therefore, I will do so without provocation and will focus solely and exclusively on the facts.<\/p>\n

And the most important thing I want to say right now: the audiophile arguments are not arguments related to any technical or engineering aspect. Audifilov’s arguments contradict science, specifically physics and mathematics. They also contradict technical and engineering aspects and audiophiles don’t know how their audio systems work, but this is a small problem compared to how they contradict physical or mathematical laws, showing a complete ignorance of the basics. It is the scientific aspects that I will focus on instead of explaining what the different types of CAD are and other details that are not of fundamental importance.<\/p>\n

1. Basics: how sound is reproduced on a computer and any other electronic device<\/p>\n

To begin with, an audio file is on a digital medium, such as a hard drive. This audio file has a certain internal format, but they are all a set of zeros and ones (0110010101 …), that is, any file can be represented as a very large number. This number can be easily converted to the usual decimal number system (189208 …).<\/p>\n

The direct consequence of this is that the copies of the same file are all exactly the same. It doesn’t matter what medium they are in or how they were transferred or created: if the copies are correct, then they are exactly the same. The difference in playing the same file can only be caused by some other element in this play chain.<\/p>\n

And this string is like this:<\/p>\n

File -> audio player program -> digital to analog converter (DAC) -> amplifier -> speakers or headphones.<\/p>\n

It works like this:<\/p>\n

First, the player program loads (or receives from outside) an audio file into memory.<\/p>\n

The software then decodes it, if necessary, into an uncompressed digital stream, which is digital audio. We will simply call this uncompressed digital audio .WAV and assume that this is the format in which music is delivered on conventional audio discs (two-channel stereo, 16-bit, 44.1 kilohertz per channel).<\/p>\n

After that, this sound enters a digital to analog converter, which takes each number and converts it to an analog value that corresponds to it, most of the time it is a voltage measured in volts (from a certain minimum value that corresponds to a digital number 0 and up to a maximum value that corresponds to the number 65,536 – this is the maximum number that can be written in 16 bits).<\/p>\n

After that, the sound, already in the form of electric current, enters the amplifier, the task of which is to raise the voltage to a value that suits the speakers. The amplifier must amplify the signal linearly, that is, each value that reaches it at the input must increase in the same proportion at the output.<\/p>\n

In the speakers, the electric current is converted into physical vibrations, which are transmitted to the air and thus the sound we hear is obtained.<\/p>\n

This chain, which from now on we will call the audio path, is present in one form or another in any digital audio system. The elements themselves may look very different on different systems (MP3 players, smartphones, computers, etc.), but they are necessarily present. When it comes to a computer, the DAC and amplifier are on the sound card (which is often built into the motherboard). Speakers often have their own built-in amplifier, and some of them may have their own DAC (and connecting to them bypasses the sound card).<\/p>\n","protected":false},"excerpt":{"rendered":"

How digital sound works. (Part 1) In this post, I’d like to talk about digital sound and, along the way, expose such a popular form of freestyle as audiophilia. Unfortunately, lately I see more and more manifestations of this phenomenon, penetrating the minds of even quite reasonable people and causing them to spend money on … Continue reading “How digital sound works. (Part 1)”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[47430,47436,47434,47433,47435,54497,47438,47439,47441,39544,47443,47449,47452,47459,47458,47446,47444,47432,47431,28076,47453,47454,47450,47455,47457,47655,47440,47448,47442,47447,47445,47460,47464,47463,47461,54498,47465,47462,47466,47467,47469],"class_list":["post-2627","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-are-sound-digital-amps-any-good","tag-can-analog-sound-digital","tag-can-digital-piano-sound-like-acoustic","tag-can-digital-sound-as-good-as-analog","tag-can-you-hear-digital-sound","tag-digital-hd-sound","tag-do-digital-cables-sound-different","tag-do-digital-cameras-have-sound","tag-do-i-need-a-digital-sound-processor","tag-does-analog-or-digital-sound-better","tag-does-digital-sound-better-than-analog","tag-does-digital-touch-have-sound","tag-hd-digital-cinema-sound","tag-how-digital-sound-is-recorded-on-compact-disc","tag-how-digital-sound-works","tag-how-does-digital-sound-recording-work","tag-how-does-digital-sound-work","tag-is-digital-sound","tag-is-digital-sound-analog","tag-is-digital-sound-better-than-analog","tag-soundmax-digital-hd-audio","tag-soundmax-digital-hd-audio-driver","tag-soundmax-integrated-digital-hd-audio","tag-soundmax-integrated-digital-hd-audio-lenovo","tag-soundmax-integrated-digital-hd-audio-manager","tag-soundmax-integrated-digital-hd-audio-windows10","tag-what-do-digital-modes-sound-like","tag-what-does-digital-sound","tag-what-does-digital-sound-do","tag-what-does-digital-sound-mean","tag-what-does-digital-sound-out-pcm-mean","tag-what-is-digital-sound","tag-what-is-digital-sound-in-hindi","tag-what-is-digital-sound-in-multimedia","tag-what-is-digital-sound-out-pcm","tag-what-is-digital-sound-output","tag-what-is-digital-sound-processing","tag-what-is-digital-sound-processor","tag-what-is-digital-sound-system","tag-whats-dolby-digital-sound","tag-which-digital-sound"],"yoast_head":"\nHow digital sound works. 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