This week, the owner wants to talk about the recent feedback on Project ClayX I2S Digital Coaxial Audio Interface.
Why shop owner want to produce this Coaxial Product while most DAC support USB?
The reason is the shop owner is using Wadia 2000 Decoding Computer. It only can accept Digital Coaxial Input. The product itself is design for my own use. However, one day some client come to visit me. Saying that he have a very decent DDC which can decode DSD with Digital Coaxial Input made by Hong Kong DIY. Very good sound compared his new R2R dac.
The shop owner said, the old DAC is not outdate at all, they all sound really decent, with great design. The shop owner promised him tol make a I2S coaxial product to take care of the people who have their vintage famous dac without USB port, but want to have playback platform like Raspberry Pi 3 for access music and used as control point with mobile Apps.
The owner said: Wait for my good new, we will start to think and build a new I2S Coaxial Bridge, which can be re-born the vintage DAC and used it again.
The client reply: Great, I looking forward to see this new apporach to re-use my old DAC which used to be sound great and if possible can playback DSD with digital coaxial input. As you know, the digital coaxial is far better then USB cable and the easy to tune the sound with different famous brand of coaxial cable.
The owenr said: The show owner believed that the design behind the product should be easy to use and benenfit to the most people. The workmanship on each DIY product should reflect and provide some connection with client's requirement.
That's why we have to develop this product, this I2S coaxial product is unique to the market, with separate I2S cables, and 5V DC plug input, use the best audio grade component to ensure we satisfy on excellent sound quality.
Shop owner always believe Raspberry Pi 3 is very sensitive to external power supply, the better the power supply, the sound will be more refine with more density details.
Technical Insight: Can I avoid to use microUSB as main power supply to Reaspberry Pi3?
The answer is yes, the shop owner implement the power cable directly to Raspberry Pi 3 GPIO ports. The sound can be greatly improved, and more details afterwards. It is because, this can bypass all the power regulators and fuse inside the raspberry circuit. The power can directly fit to the circuit with their good linear power supply which was already optimized with filter and regulated with computer control DC circuit etc.
What is TXCO? "TCXO, Temperature Compensated Crystal Oscillator - the TCXO, temperature compensated crystal oscillator is used for providing a much higher levels of temperature stability than are possible with a normal crystal oscillator.
The TCXO, Temperature Compensated Crystal Oscillator (Xtal oscillator) is a form of crystal oscillator used where a precision frequency source is required within a small space and at reasonable cost.
By applying temperature compensation within the crystal oscillator module, it is possible to considerably improve on the basic performance of the oscillator."