The shell is made of all-aluminum CNC, and the whole aluminum plate is hollowed out. The appearance is exquisite, compact, and beautiful. The top is engraved with LOGO, which is the icing on the cake With 12 years of experience in audio DAC design, everything is for the perfect sound Exaggerated wording is not our specialty. . . The latest Bluetooth supports LDAC function The shell does not carry a logo, just the difference between fonts, no other changes To answer some questions from some customers recently:1. Q: Why is there no display Answer: The display is really beautiful, but because it operates at high frequency, it will interfere with the circuit, deteriorate the sound quality, and increase the cost.2. Q: Why not make an electronic switch Answer: The electronic switch can only switch signals, and can not turn on or off multiple sets of power. The corresponding circuit will only be powered on when the current decoding mode is used, to avoid unnecessary mutual interference (such as when using the USB port to decode, Bluetooth The module is not powered, so that there will be no RF signal up to 2.4G to interfere with the analog circuit. When using Bluetooth, the USB part will not supply power.), and all the circuits of the electronic switch must be powered. This will interfere with each other, deteriorate the sound quality, and reduce the details and background of the sound Using Ess's high-performance ES9038Q2M as the decoding chip, XMOS XU208 chip as the USB interface, APTX-HD Bluetooth 5.0 program, plus MCU control, automatic decoding DSD, PCM music format, 3 groups of input decoding, amp, linear output interface. Can decode PCM384K, DSD64, DSD128, DSD256 format music (DSD256 uses native playback). Coaxial input supports DSD 64 DOP format The Bluetooth chip is the British CSR8675, supports Bluetooth 5.0 protocol, supports CD-level sound quality transmission protocol ATTX and APTX-HD, the module is specifically optimized for music playback firmware, the DAC directly decodes the CSR8675 IIS digital signal, supports 48K/24bit format, not Using its internal DAC can greatly improve the sound quality Note that there is no call function. The straight line receiving distance of Bluetooth is about 5-6 meters, and partition walls and obstacles are not supported (because the Bluetooth antenna is built-in design) APTX-HD audio technology can ensure that wireless Bluetooth®-enabled devices can provide high-definition (HD) audio. This technology protects audio data during audio transmission and provides a better than CD listening experience. The op amp uses the Japanese JRC company's high-performance JRC4580 op amp*2, which has better performance than NE5532 and supports plug-in replacement and upgrade This DAC has the following characteristics:1. Use the British XMOS company's USB audio decoding solution --- XMOS XU208, a stable performance asynchronous transmission chip, which is more resistant to hearing and charm, more stable and reliable than the Italian Amanero, and there will be no problem of losing firmware2. The DAC chip is ES9038Q2M from the American ESS company, which directly decodes 384K PCM, DSD64-DSD256, format signals, and enjoys master-level audio3. Built-in 1500mW high-fidelity amp, large thrust, good low frequency response, suitable for headphones within 16-300 Euro4. The USB interface supports OTG Android phones, set-top boxes, etc. Android 5.0 and above can be used directly (Note: Apple phones require a camera kit to use). It is recommended that the mobile phone install the APP software haibyMusic to support the DSD format5. The sound card supports Windows system (drivers need to be installed to use), MAC, linux (these two operating systems do not need to install drivers)6. Support coaxial, optical fiber, Bluetooth 5.0 lossless input decoding function, can be connected to TV, DVD, set-top box, mobile phone, etc., convenient for external audio, can significantly improve the sound effect Coaxial supports DOP DSD64 format decoding7. The Bluetooth antenna is a hidden design, beautiful in appearance and easy to carry.8. Multi-level precision ultra-low ripple voltage regulator chip, plus components for audiophile audio, is a guarantee of good sound.9. Technical specifications:Dimensions: 140*96*21mm (excluding protruding parts)Weight: 300gHeadphone power: 1500mW/32 Euro, 200mW/300 EuroAudio output distortion: 0.0035%Signal to noise ratio: 108dBAudio output amplitude: 2V RMSWorking voltage: 5V 1.5A (note not to over-pressure)Coaxial support format: PCM 44.1K-192K/24bit, DSD64 DOPOptical fiber support format: PCM 44.1K-192K/24bitUSB decoding support format: PCM 44.1K-384K/32bit, DSD64-DSD256 automatic recognition decoding

USB driver, player, plug-in download address: https://pan.baidu.com/s/1Mg2dH5l7M7jF9-UW_pSqow(If you need a cracked version of Native playback driver, please contact the owner to provide it, only the system below WIN7 is applicable, WIN10 is not supported) The player is best to use FOOBAR 2000, and the player installs ASIO plug-in, in order to play 352.8K-384K music files, the computer system can only display 192K is normal DSD music test file download:DSD64: http://pan.baidu.com/s/1bnGWI2VDSD128: https://pan.baidu.com/s/1GWZT4eP8PN_C9F0Kx76eJg-------------------------------------------------- -------------------------------------------------- --------------------- Driver installation and FOOBAR player settings: First connect the USB cable with the computer, install the driver, this is very simple, no longer introducedNote: When installing FOOBAR, select Full installation FOOBAR player settings:1. First open the player File-Parameter Options, click Component on the left, then click Install in the lower right corner, install the downloaded ASIO plug-in: foo_out_asio.fb2k-component (first unzip the downloaded plug-in compression package ), press OK and restart FOOBAR, after the installation is complete, as shown below

2. Install the ASIO Proxy Install-0.7.1.2.EXE file in the folder foo_input_sacd-0.7.1 in the plug-in package, as shown below

3. On the FOOBAR Parameter Options page, click Play --- Output on the left, and select the output device on the right: ASIO:foo_dsd_asio, as shown below. (When the WIN10 system uses FOOABR1.3.14, the output device selection is DSD:ASIO:XMOS USB AUDIO 2.0 ST 3004 ASIO 1.03)

4. Click ASIO in the Output drop-down menu on the left, double-click on the right: foo_dsd_asio, as shown below

Double-click foo_dsd_asio and the menu that pops up is set and closed as follows

5. Click Tools on the left, select SACD Decoder in the drop-down menu, and select DSD as the first item in the menu on the right, and press OK to complete the setting. . As shown below:

When playing DSD songs, the system volume of the XMOS sound card must be adjusted to 100 to have sound, as shown below

Random attachment: 1. A USB data cable2. An external high-performance power supply Bluetooth connection settings:1. Set the input selector switch to the BT position2. Take the mobile phone as an example, enter the phone's Settings-Bluetooth, click Search for devices, and later search for Leaf Audio or BT SPEAKER and then click on it, then the phone prompts whether to pair with this device, Click Yes to connect successfully. The Paired Device will show Connected to Media Audio and then you can play the song.3. It is recommended to use a mobile phone that supports ATTX or APTX-HD, LDAC function, the sound quality is very good. note:1. XMO SUSB cannot be recognized after connecting to the computer. In this case, the USB cable may not be properly released or the external power supply voltage is not enough. Please exclude the USB cable or the power supply voltage is 5V.2. The sound card can not be connected to the USB interface on the front of the desktop computer, because it may cause pop noise during playback.3. Because the Bluetooth antenna is built-in and portable, the effective distance is about 5-6 meters. There should be no partition walls or obstacles, otherwise it will affect the signal and cause sound interruption.4. If you find that the Bluetooth device cannot be paired, please turn off the DAC for 1 minute, then turn it on and re-pair.5. The plexiglass on the cover is a Bluetooth antenna and Bluetooth signal indicator, do not block it with objects Does the phone support APTX, see here: https://www.aptx.com/products?field_product_brand_tid=All&field_product_category_tid=126&field_aptx_type_tid=482Introduction of APTX-HD: https://www.aptx.com/zh-hans/aptx-hdIt is recommended to use a mobile phone with ATTX function, the effect is really good, otherwise the effect is greatly reduced The effect of LG G2 used in our store test is similar to that of USB connection with computer and APE. Explanation of Bluetooth format:a. APTX-LL: lossless audio format, 32mS ultra-low latency;b. APTX-L: lossless audio format, 60mS low latency; supported devices: Samsung, HTC and other mobile phonesc. AAC: lossless audio format, 120mS delay; supporting devices: iphone mobile phone and IPADd. SBC: lossy audio format, delay 120mS-200mS; supporting equipment: basic audio format of general Bluetooth devicese. APTX-HD: lossless audio format, supports 48K/24bitf. LDAC: lossless audio format, supports 96bit/24bit