SONY, this word represents the peak of industrial design, has always been the leader of the trend. In my impression, Hi-Res Audio is another belief that SONY is defined by the music enthusiast after refreshing the extreme screen resolution. Hi-RES is also known as High Resolution Audio, also known as high resolution audio, refers to a sound quality above 44.1 kHz / 16bit (CD sound quality), which is clearly different from the HIFI we know. HIFI is a generalized concept, and Hi-RES is really a high-resolution audio standard that is truly defined. This time, the pavilion network has got the Khadas Tone board of Shihong Technology - a Hi-RES-level development platform that truly burst with music enthusiasts, which can be used directly with the PC, and can cooperate with open source bills on the market. The board is used, such as the Khadas VIMS series development board, Raspberry Party, etc.
At present, the Tone Board launched by Khadas has two versions, which are VIMS Edition versions and generic energy versions. The VIMS Edition version is convenient to expand, which is convenient to adapt to existing development boards; and Generic Edition Some interfaces have no patches, more suitable for use alone.
Khadas Tone Board out of the box
Tone Board got the hand is a VIMS Edition version, and the appearance visual has a sense of technology, and the packaging is simple.
The back of the box has a detailed parameters of Khadas Tone board.
Among them, the scheme adopted by the board is a combination of XMOS controller + ESS ES9038Q2M 32bit DAC, supports Line Out and S / D DIF interfaces.
The packaging inside the box is also relatively reasonable, and the board has bubble bags to prevent severe collisions during transportation.
Tone Board also provides a complete combination of accessories that basically opens.
Accessories include: Tone Board (soldered 20 foot rollers and 40-legged), USB TYPE C data cable, screw (including fixed screws when you combine with the VIMS series)
Tone Board's hardware design is definitely simple but scientific and technological, and the board device layout is clear, which is also a must-have hardware quality of an excellent audio circuit.
Look at the specific hardware composition on the board:
The next figure is marked with 4 low phase jitter crystals.
The SIT820 & 8209 series of SITIME is only 0.5 ps phase jitter, the output frequency is stable, less than +/- 10ppm, the data clock jitter of the entire audio system. 1881.30ps.
The standard red IC of the above figure is XMOS XU208-128-QF48, supports 8 channel analog output, Tone Board DAC (ES9038Q2M) has been used 2 channels, and users can add DAC 8 channels as an extension.
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The yellow IC of the following figure is ES9038Q2M 32-bit DAC, which is an ESS DAC. This is a balanced performance and power-consuming mobile DAC. There is also use in many famous main music, such as Vivo, but due to mobile phone volume limits It is inevitable that there is no doubt that there is no performance of this DAC, but in Tone Board, you can really look forward to it.
The two important indicators of the ES9038Q2M nominal are as follows. If you look directly, you can do it.
DNR is: + 129dB
THD + N is: -120db
The figure is marked in red, three independent high-performance OPAs, model RT6863, supports independent power supply, and the reliability of signal quality is guaranteed.
The following figure is the FPC extension interface on Tone Board, including the I2S, OLED interface, and an external extension interface of the XMOS 8 channel.
The following figure is Tone Board 3 main audio interfaces.
As a USB sound card, TONE BOARD is extremely thick in hardware design, especially the material, and special design plate type, which can be used directly with the PC, and can cooperate with their own Khadas VIMS series development board. Or the use of Raspberry Pivotes on the market, the scalability is also very good, it is really rare, and the partner who loves high quality music is a nice DIY magic.
Used
With PC use
The use of Tone Board is also very convenient. If you use the PC, first install the XMOS driver, then directly connect your computer directly through USB-C.
Take Windows 7 as an example, other Windows systems are also similar. Install XMOS Drive (Download Driver), extract and run setup.exe to install the driver, you can see the XMOS device in Device Manager after the installation is complete.
You can set XMOS sound card drivers in Windows sound settings.
The player is using FOOBAR2000, all settings are set to the highest sampling rate.
Without the instrument test, I can only have the subjective listening. It is really a day with the sound card comes with my laptop. It uses Tone Board and the sound is thorough, even the empty spirit, do not say how the parameter performance is, anyway, Subjective listening is relatively good, great.
With Vim2 Basic
At present, Khadas's surrounding accessories for VIM series developers, such as the radiator kit, or very nice.
Combine the VIM development board and Tone board, the intermediate layer is equipped with a heat sink, so it doesn't have to worry about the heat dissipation of the VIM board, and the combination of Tone Board and VIM card is also connected via a USB signal connection.
The board of the board is as follows:
In addition, Khadas is equipped with a high-quality audio teleconcover (3.5mm to RCA2) for Tone Board, but it is necessary to purchase additional.
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The playback system built with VIM developing board, opens the parameters, Tone Board sound quality, the use is also extremely convenient, it is indeed a rare development platform for sound quality.
Khadas launched Tone board development board hardware is full, equipped with XMOS Xu208 + ESS ES9038Q2M, equipped with 4 low phase shake crystal crystal, 3 independent OPA, can be said to be extremely "luxury" configuration, the result is not unexpected The sound quality is extremely great. For friends who like music, this is a good platform that can be considered.
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