John UM
A lot of new ones. Burning. After the headphone sound, I feel that the sound quality of different headphones is different, but the difference in sound quality is not big. However, many “old burning” pays great attention to the front-end investment, and thinks that “good horse is good with saddle”, good back end Need a good front-end match, then why are there two differences in cognition? After thinking, the author got the answer
The fundamental reason is that the times are different, and the front-end benchmarks are pulled too high, which leads to the gap between low-end devices and high-end devices. How do I say this? I will talk slowly
Inspired by the comparison of the “drum machine party”.
I was greatly inspired by the recent review of 2010-2014, some lovers of research quality pits, comparing the quality of PS3, PS4 and various brands of disc players at that time, let me Very concerned about the PS3, PS4 or CD player, when playing DVD, the difference in picture quality is very obvious, the disc player at ordinary price is not even as good as PS3, only the high-end disc player can win the picture quality of PS3. However, when they both play Blu-ray, the difference in picture quality is very small. The reason is that the encoding precision of the DVD era using the MPEG2 encoding, and the accuracy and quality of the 1080P disc using the AVC encoding era are not a grade at all. When playing a DVD, even if it is accurately decoded, the obtained image can not conform to the high definition. The needs of the times, so the programmer wrote a lot of accurate stretching algorithms to accurately sharpen the DVD picture to achieve the effect of improving the picture. Thus, the difference between the high-end DVD player and the low-end player came out.
However, when playing Blu-ray discs, the AVC can accurately decode the AVC to achieve a satisfactory picture level, which is clear enough, so no need to modify more, just need to restore the information accurately. Can achieve high definition image quality
Nowadays, in the 4K era, even if the nuclear display can accurately decode the HEVC encoded document, the ordinary PC can output enough exquisite video images. The general disc player has no advantage over the DVD era. Even if it is up-converted by 4K,The
Can be improved, and it is far less effective than the DVD stretching to the 720P era. Therefore, the role of the front end in the entire video system is weakened. It is accurate that the front-end benchmark is pulled up. What the machine does is to optimize the circuit and ensure absolute stability. The advantages in image quality are limited. The upgrade you can upgrade with a linear power supply is far less advanced than the addition of a high-precision sharpening algorithm in the calculation process. Therefore, it is inferior to the picture, and is not sensitive to the picture quality. Obviously it is “metaphysics.”
Talk about past portable audio devices.
This reminds me of the relationship between the front end and the back end of the audio system
In the past, the sound quality of portable devices was very low. The era of portable tape drives was not mentioned. When everyone found that CDs could be played portablely, they all thought that they had found a new high point of portable sound quality, but the low-end portable CD player The circuit design does not completely shield the optical head.
The mechanical noise brought by playing the CD, so the earphone cable is transmitted to your ear. The sound you hear is a higher-end sound source than the tape. The upgrade of the sound quality is the upgrade of the sound source, but it is not The upgrade of the equipment, and the “high-end front end” pursued at that time, is to have a better shock-proof CD player that suppresses mechanical noise. The circuit design is designed to allow less noise to pass through. This is the “low-end device” and then The difference between “high-end front end”. The stability and noise reduction performance of the desktop CD player is much better than that of the portable device, so the difference in sound quality is very obvious, not the present. That kind. The difference is the difference that can really be felt in one ear
And in the era when the MP3 player was born, it has completely become the era of digital processing. The portable device completely solves the mechanical noise generated when the CD player plays. Although the sound source is lower than the CD player era, the threshold for good sound quality is obtained. It has been reduced. The desktop CD player can rely on a solid circuit design to shield the noise caused by vibration as much as possible. Portable CD players, especially low-end portable CD players, can’t do it, but pure digital MP3 portable devices don’t bother mechanical noise. Although the upper limit of the sound quality has decreased, the benchmark has increased. You can pay a big price to get a clean background of a very clean portable CD player, and you can get it at a small price
With the continuous updating of technology and the continuous iteration of devices, this benchmark is constantly being refreshed. For example, in the era when MP3 just appeared, the decoding ability of low-end MP3 players and decoding chips for high-end MP3 players may have an ear quality difference
But in the past 10 years, the chip that can be used for decoding audio on the mobile phone is the quality level of the decoding chip used by the HIFI-class MP3 player at that time. At this time, the sound quality of the general device has risen to a very high level, then you Then pursue HIFI.
It’s very difficult to get the “one ear boost” of the year
Finally, HIFI equipment began to pursue some metaphysical, non-linear, and pure gold lines. These are not upgrades, but under the general system, the upgrade is too limited, and when your equipment is behind End, the front end is good enough, you don’t have room to upgrade, you can only upgrade some of these parts, that is the real reason why fever is now called “metaphysics.”
Like a set of special complete audio systems, turntables, decoding, clocks, interfaces, amplifiers, and backends, each piece is separated and used with high-precision equipment. When the CD player is just a tape drive, it is Unthinkable, the upper limit of sound quality has indeed improved, but it has greatly increased the threshold of fever
This is also why there are many back-end brands (enterprises) that have used fever equipment in the past, and there are many front-end brands. But now it seems that the front-end brands (enterprises) are left with so many reasons, not because people’s needs are The decline, but the basic level of the front end has risen sharply, and the threshold of fever has become higher and higher. The equipment for fever is upgraded to a certain level, the parameters of the equipment are all high to a certain level, and the manufacturers can only engage in some things that are not there to fool consumers. This is the root of “Xuanxue”