The signed version means that GG can use it to broadcast the CD destination. Its density, thickness, atmosphere, and harmony are the same as what you imagine“Ideal CD player”Not necessarily the same, but welcome to compare with any high-priced CD player on the same platform……Not afraid of not knowing the goods, but afraid of comparing goods.

DENON DN-500C Chinese introduction: http://www.ezprointl.com/getimage/index/action/images/name/54d1eb30a5324.pdf

https://www.denonpro.com/index.php/products/view/dn-c640

https://literature.puertoricosupplier.com/028/MF28215.pdf

SONY CDP-D500 official website manual    https://www.sony.ie/electronics/support/res/manuals/3858/38588703M.pdf

The Way of Good Voice

1. What kind of voice is good
       Audiophiles judge whether the sound of the speaker is good or not. Most of them compare another set of speakers or two devices based on impressions or on-site. This can be regarded as“Which device to compare has better sound”, And then often fall into confusion: Is this sound good enough?
       Perhaps in terms of price/sound level, this is a way to choose and choose, but it does not judge a good voice.
       For sound, a good voice means that the singer and the band are in front of you, just like friends who talk, sing, and play face to face, or those bands that are in the street or theater and hear directly without plugging in.——These experiences are not difficult to obtain, and everyone should have experienced them.——It''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s not that the sound of the speakers/headphones is in front of you, but the singer and the band are in front of you, and it doesn''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t feel coming from the speakers/headphones.
       This is the result of a whole set of systems sounding.
       Serious audiophiles can try to compare directly with the sound of personal experience instead of comparing with a certain device or a certain set of speakers. This is a straightforward approach, no detours.

2. Why is it so difficult for speakers to make a good sound?
       At the end of the previous paragraph, a difficult problem has been left: Is there such a sound in this world?
       Without the combination of LTG and IDL, there is no such sound in this world. At least, gg has searched the world at the price of Form 7 and has not found it.
       Why is it so difficult for speakers to make a good sound?
       Regardless of recording and publishing, let us respect the fact that the market has already formed and continue our analysis based on the usual level of sound recordings.
       Human hearing, the arrangement in instinct is“Found prey”and“Perceive the danger”, It accumulates in clan memories and daily life, and automatically divides the heard sounds and instincts into“Safety”To compare:“Abnormal noise”It means danger, it will immediately arouse instinctive anxiety, even if the dangerous baby cannot be clearly identified, it can be“Abnormal noise”Scared to cry. In the film industry, use“Abnormal noise”There are many examples of similar music and sound effects to set off an uneasy atmosphere. At that time, it was difficult to escape the uneasy feeling by covering your eyes. It was enough to close your eyes and cover your ears.
       Audio playing music, naturally, is not playing the sound effects of the abnormal noise in the movie. However, once a voice is different from the same kind of voice that people often hear, it is brought on“Abnormal noise”The ingredients are subconsciously classified as dangerous and cause anxiety. This kind of uneasy voice was confirmed as“Not dangerous”After that, it will disappear from consciousness and senses, but it will not be able to paralyze the subconscious.
       Listen to the sound with the expectation of the singers and band performances, but wherever it is not real enough, the instinct of uneasiness and escape will be awakened subconsciously, making it difficult for people to immerse themselves in the music with peace of mind and concentration.
       Except for the combination of LTG and IDL, the audio is very difficult to play“like real”. Unbalanced frequency distribution, unnatural sound field characteristics, rigid sound……All kinds of defects, etc., will be subconsciously classified as dangerous, resulting in an instinctive willingness to escape. Anglers can fish for a long time in a row, book lovers can watch it for a long time, and mahjong lovers can rub it for a long time, and those who love music can hardly listen to it for a long time.

Third, why the sound is good
       By 2020, there will be LTG audio sources and IDL power amplifiers in the world, which have respectively achieved the ideals that can be achieved under the existing commercial audio formats, human electroacoustic technology and existing materials in audio sources and power amplifiers.
       Regarding the choice of power amplifiers and speakers, and how to build a system, please Baidu gg’s early article "Ten Steps to First Burn, Reduce Detours"（https://www.jdbbs.com/thread-5749576-1-1.html）,in“The price ratio of the three major components of speakers, amplifiers, audio sources and other supporting equipment is roughly 3:3:2:2”It is recommended to change to 3:1:1:1 to consider. You can figure it out.
       The total budget is the upper limit of the good sound of the above-mentioned LTG and IDL sound systems. Most of the sounds from different budgets have nothing to do with the consideration of sound quality and timbre, but with the characteristics of the sound field and emotional expression, with the atmosphere, extravagance, and harmony, and the home of audiophiles. The level is related.
       Equipped with speakers of appropriate size in the listening space, select an IDL amplifier that can fully drive the speakers, and then select an LTG sound source within the budget according to operating habits; match the signal line and power line above the Wizard of Oz, and place them appropriately. That''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s it.

Fourth, how to judge and check the sound
       As mentioned earlier, a good voice is the voice heard directly in real life. It’s not easy to play music with stereo（Singer, band）Corresponding directly, it may not be possible to start from here if you want to judge and check the sound.
       Please believe in the subconscious perception and accumulation, they are far beyond the feelings and experiences that people can express themselves, and they are also far beyond the feelings and memories that people can express themselves.——Even if you think“There is no experience that can be compared with the current track”, Even if you have not heard the sound of some musical instruments live, even if you only hear the electroacoustic scene of singers and bands in concerts or concerts, it will not hinder the subconscious judgment and inspection of good voices.
       The LTG and IDL systems have been boiled for 50 hours, and after placing them in place, play some of your favorite and familiar tracks.
       There is no need to think back to the various sound quality and tone color evaluation standards, nor to the impression of listening to this track on other sound systems. Put away all knowledge and all experience, let go of all baggage, relax your ears, relax your head, and relax your mind. Give yourself completely to your subconscious.
       A good voice is when the singer and the band are in front of you. It feels like a band where friends talk, sing, and play face-to-face, or when they are in a street market or a theater that they hear directly without plugging in.

                                                                       July 11, 2020

Talk about the problem of fate

       gg spent a lot of time and energy searching for his homecoming as an enthusiast. Some feelings are reviewed below.

       gg believes that the home of a fever is to find a high-quality sound system that can withstand scrutiny. From then on, listen to music with peace of mind. This involves going from oneself, to equipment and sound recordings, and then back to oneself. It is not simple and not easy.

1. Goals and the problems of the recording industry
       Audiophiles pay attention to high fidelity, what kind of voice should they pursue and what goals should they set?“How much sound do you want”The fully subjective method of judgment has been circulating for many years, but it’s just a list of“A thousand hamlets”, Everyone''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s judgment is different, the more you have to be more confused. You might as well look at it the other way around, what audiophiles listen to, the source, and what sound recordings are they.
       Since XD’s invention of electrical recording in the late 1910s, although carriers and tools have evolved for several generations, there has been no substantial change in the recording industry and the production process of mainstream recording products. No matter what sound recordings are, they are collected, processed, produced, and distributed in a certain space environment. Look at it this way, essentially with the movie screen“Not equal to true”Similarly, sound recordings are not purely on-site, but processed products. For example: most solo recordings, singers wear headphones to listen to the previously recorded soundtrack to sing; most orchestras perform recordings with multiple microphones placed in different positions, and then several sound tracks“Mix”of.
       Sound recordings should be displayed as far as possible in the selection/processing of recording venues, tool/equipment configuration, post-production synthesis, etc.“Reasonable space environment”, To beautify the sound to a certain extent. Example: Most solo recordings, the band records in a small concert hall or each group of instruments is recorded separately, the singer is in the recording studio“Dry recording and wet listening”, The vocal post-production compression, reverberation and accompaniment are coordinated; most orchestras perform recordings. In 1933, Xidian broadcasted the Philadelphia Symphony Orchestra''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s performance at the Constitution Hall in Washington. Leopold Stokowski was not in Philadelphia, but in Washington. Taiwan, the recording mode has been solidified.
       The technical specifications of digital sound recordings have always been monopolized and imperfect. CD was born in 1982, and the defects need not be repeated. Since then, high-bit-rate PCM recording equipment has gradually improved, but the CD specifications have not improved; SACD/DSD was born in 1997,“The amount of data”The above has an approximate corresponding relationship with high bit rate PCM, which mainly reduces the difficulty of replaying large amounts of data and forms an unbreakable anti-piracy mechanism. The effective data volume of digital sound recordings theoretically indicates the upper limit of its sound quality; and the corresponding file size and index specifications, DSD128, PCM24/192 are already the upper limit of the actual storage/transmission and playback of the perceived sound quality……Higher-specification files are too large and involve storage and transmission, and the index specifications far exceed the range of playback equipment/human ear perception.
       So this question is not“Problems in the recording industry”, But“Audiophile''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s goal”How to realistically adapt to the problems of the recording industry and recording products. All kinds of unrealistic high-profile circulated in the enthusiast circle, those fantasy recordings do not exist, of course, they are seeking fish, seeking troubles, and can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t find a destination.

2. The history and problems of the audio industry
       The audio industry was pioneered by Western Electric. The technologies of electrical recording, vinyl records, stereo, PCM, microphones, recording equipment, speakers, power amplifiers, wires and even connectors were all invented by Western Electric.
       Xidian has faced constant anti-monopoly accusations and investigations in its history, and has repeatedly been forced to disclose technology patents and split part of its business for free as conditions for settlement to avoid dissolution. From 1912 to the 1960s, Western Electric’s audio films and broadcasting equipment were separated and merged into Vitaphone, Westrex and Western Electric Corporation, and Victor was born.（Started as a record/phono company, now JVC）Columbia（Started as a record/phono company, now DENON）, BBC（Xidian is the founding shareholder）, JENSEN（Xidian employees founded）, ALTEC（Xidian employees founded）, JBL（Xidian employees founded）The development of westrex in the UK established the basic pattern of the early modern audio system.
       The situation of being forced to disclose patented technology for free has objectively prompted Xidian to turn a large number of technical secrets into“Non-patent proprietary technology”, Deliberately or unintentionally hide a large number of early research results of electroacoustic technology. Xidian and its partner manufacturers have directly supplied finished products, from recording microphones to recording equipment, from LP records to RIAA, from tube/transistor components to record players, from amplifiers to speakers, and even cables and connectors. After a good example is made, other manufacturers in the audio industry can directly imitate and improve, and the need for basic research is greatly reduced.
       For a hundred years, there has been a lack of basic audio research and a lack of indicator systems. The process will not start here. Let’s just take a look at the results: In the entire industrial product system, indicators, parameters, materials and appearance designs can correspond to the grades of products, such as automobiles and airplanes. , Refrigerator, air conditioner, washing machine……This is not the case with audio products alone. The indicators, parameters, materials and design cannot be equal to the product grade or the actual experience of the user. Audio equipment mainly only has a few extremely simple indicators such as distortion rate, signal-to-noise ratio, slew rate, sensitivity, and dynamic range, which cannot accurately reflect the actual level of sound. There is no system, no research, no indicators to reflect the timbre and sound field characteristics that can be paid attention to, not to mention the expression of emotion and extravagance.
       This is the problem of the audio industry, and it is also the home of audiophiles.“Hard obstacle”.

3. Facing the contemporary home of reality
       Recording products, sound source, power amplifier and speakers.
       In contemporary times, the mainstream sound recordings are CDs. SACD has been on the fringe and failed to become mainstream. The development of the network and streaming media has prompted the establishment of the Hi-Res Alliance, and the popularity of DSD and high bit rate PCM file playback has gradually increased.
       In theory and indicators, SACD, DSD/high bit rate files are better than CD. But the reality is that in the entire audio industry, SACD players, DSD/high bit rate file players（decoder）It has never reached the sound level of Hi-End CD players. Example: The expensive CH, dCS, Tianqin, Ersao, Golden Voice, and Lux ??disc players are all SACD players, but users are ashamed to claim to be“Master listening to SACD”, Even if these machines are second-hand, they only say XX CD player……SACD is ignored; LINN and the above-mentioned manufacturers have also released expensive DSD/high-bit-rate file players. Most of them are young users who advertise fashion, and older users follow the trend. They also cannot act as the main force of Hi-End. Some users Even keen on a soft DSP like ROON, almost can''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t feel the damage to the sound level.
       LTG truly exerts the advantages of SACD, DSD/high bitrate files from basic theory and practice and real objects/examples, reaching the sound level of the first-class vinyl system for broadcasting new records, and the medium opening machine for broadcasting the original opening tape, completely eliminating the entire The CD category is a real-life recording（SACD disc, DSD/high bit rate file）The destination of the broadcast. DSD/high bitrate file playback methods generally include hard disk players, network players, and DSD decoders. Decoders generally require basic computer operation, and network players may also require NAS or computer operation basics. Please note Consider your own operating habits.
       Modern power amplifiers have a long service life and can achieve great power, but there are different reasons why they are generally difficult to match the antique tube amplifiers. gg boils down to the lack of basic theory of power amplifier and lack of indicator system in the entire audio industry, and the output transformer of the power amplifier is lost. UPM has re-recognized the working core of power amplifier from both power and signal aspects. IDL performs full signal link adjustment based on UPM, re-realizing near-ideal audio signal power amplification.
       Among the three major items, the speakers are truly developed and basically separated from the Western Electric structure. The design and manufacture of horns, frequency dividers and cabinets stand together, and the existing index system can basically reach the ceiling.
       LTG and IDL have realized the ideals that human electroacoustic technology and real materials can achieve in the sound source and power amplifier respectively, and have crossed over“Hard obstacle”. Determine the appropriate speaker size based on the listening space, use the LTG sound source, and use the IDL amplifier that can fully drive the speaker, configure it, and you can go home.
       LTG, IDL, and speakers still have different grades. Each grade corresponds to the subtle sound level, and to a certain extent corresponds to the listening area.……According to the current situation, if the LTG+IDL two-in-one model or IDL active speakers are used in the system, a small bookshelf box for a small room of about 10 square meters can be assembled for a home-level system of about 20,000 yuan.
       According to the upper limit of your budget, the ratio of LTG, IDL, speakers, and wire props is roughly 1:1:3:1. Choose your favorite brand and appearance to form a high-level, well-sounding system that can withstand scrutiny. , And listen to music with peace of mind.

                                                                       August 16, 2020