[For beginners] The depth is too deep!
A story about digital audio
Digital audio feedback
As a definition of audio, the playing environment of “player”, “amplifier” and “speaker” is generally referred to as audio.
And digital audio is a device that converts digitized sound to analog and reproduces it.
CD players and iPods also offer excellent digital audio.
Table of Contents
What is analog audio?
The difference between analog and digital
High-resolution sound source that takes advantage of analog and digital technology.
Feedback on the digital audio player
What is a CD?
What is a D / A converter / digital transport?
What is a system component?
What is a digital player?
What is a universal network player?
What are Network Players and Digital Streaming Players?
Digital Audio Commentary Summary
What is analog audio?
The word digital audio came up, but I will also write about analog audio.
As for analog audio, old discs are analog recording media and the equipment that can play those discs is analog audio. The analog signal is sent to a turntable, etc., it is passed through an amplifier, and the sound flows from the speaker.
Record (analog signal) → player (analog signal) → amplifier, speaker
As the name implies, digital audio converts digital recording media, such as digitally recorded CDs, to analog and plays them back.
CD (digital signal) → player (converts digital signal to analog) → amplifier, speaker
Why don’t you reproduce the digitized version digitally? I believe that. Since the speaker, which is the sound output, is analog, it is not possible to reproduce digitized information.
The difference between analog and digital
A characteristic of discs, which are analog recording media, is that recorded sound is recorded with a sense of air and presence. It is characterized by the fact that fine noises and the sound of spinning recording tapes are recorded, and that warm, deep sounds and spaciousness are created. It is around here that it is said that it is hot to hear.
As a characteristic of CD, which is a digital recording medium, data below 20 Hz and 20 kHz, which is said to be inaudible to the human ear, is truncated and converted to data. It is a frequency that is said to be inaudible to the human ear, but is actually experienced correctly.
In addition, since the signal, once digitized, returns to analog and is reproduced, the sensation of air and depth will be less than that of a record.
So why did the times change to CDs?
There are several reasons, but the first is that you need a system that is suitable to reproduce analog sound correctly, while digital can reproduce beautiful enough sound even with a low-priced audio system. Therefore, when the CD was released, the sound was clear and beautiful! The public said it, but in reality, the records have more information and they sound better.
High-resolution sound source that takes advantage of analog and digital technology.
The high resolution word I hear often these days. High resolution is said to be the removal of good quality digital and analog audio.
High resolution means high resolution, and the amount of information that a high resolution sound source has is said to be about 6.5 times the amount of information that a CD has. Since it contains information that cannot be put on a CD, even if it is not a disc, it is possible to clearly express the outline of the sound, such as the thickness and depth of all sound.
Also, the unit of quantity of high resolution information is expressed in XX kHz and XX bits. The higher the kHz value, the greater the range that can be reproduced, and the higher the bit value, the finer and smaller the sound can be reproduced. The main high resolution sound sources are “96 kHz / 24 bit” and “192 kHz / 24 bit”, and the amount of information on the CD is “44.1 kHz / 16 bit”.
The difference between CD and Hi-Res Audio source is clear when you compare them.
Of course, when comparing listening, headphones are required with a solid sound system, but in contrast to the feeling that a CD is listening to the ear, the high-resolution sound source allows sound to flow directly from the ear. to the brain.
We have introduced analog, digital and high resolution, so below we will introduce the players who play them.
