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Built In 4 Groups of  DA-8 V2 Modules
Built In FPGA Processor to Reject Jitter 
DSD , DXD 32bit / 384K Support From USB / HDMI
Built with OCC and Hi-end parts




Summarize Use Manual Specs Custom Option Shipping Cost

Please not:
        The DAC had burn in over 100 hours before shipping .
        You can power on it with playing music if you are at home for quickly finished burn in. If you don't want listen music during the burn in term, you can turn the amp volume to minimum.
        Please power off before connect or disconnect the inputs and outputs .
        Power on the product must had more than the half minute after last power off .


Function introduce :
         The DAC can setting the digital process functions on front plate to change the sound flavors, without open the unit .

Since 28th. Mar. 2019 the unit built in tda_asy firmware. The older  V3 firmware function introduce please click to read it

           R1_V3 firmwares function introduce.


Important warn:
         Before push the
"Setting" button, we are advice user turn  low  the amp volume, stop the music track playing .
         Because for the aim to reproduce the best sound quality, the DAC without mute design , change the setting may output circuit switch sound .
         Around 5 seconds after non any button had push, the display stop blink, user can click the music track to playing and  turn up the volume.

Setting button :
The setting menu had two pages. The first page had 3 digit LEDs display , and the second page had 2 digit LEDs display.
Push the "Setting" button one time, the one digit display will blink for active the function setting , push the "Selector" buttons can change function . While the display blink, push "Setting" again , the next digit display will blink . If the Synchronizer blink but push the "Setting" , the menu will change to 2nd page .


OS/NOS (Oversampling) :
         "O" for select oversampling, "N" for select NOS mode.

Mode  ( OS and NOS modes):
 While OS setting on "O" mean the DAC working under oversampling mode, lower number OS modes sound became warmer and smoother. Or depend on your sense .
         Mode "0" : class technology NOS mode.
         Mode "2" : 2X oversampling.
         Mode "4" : 4X oversampling .
         Mode "8" : 8X oversampling.

         While OS setting on "N" mean the DAC working under NOS mode, it has one mode now, it is the full new NOS configure design.

Synchronize(Syn version for correct HDMI data, Asy version for Dith)
Syn version : If the HDMI input had noise, distortion or some samplings no sound, user can setting the 1st number ON (1) or OFF (0) to fixed the issue. In default is OFF (0) .
         Asy version :
Active (1) or Disable (0)  dither for all inputs.

PLL(Simulate SAA7220 +TDA1541A sound) :
Active (1) : Simulate SAA7220 +TDA1541A, digital attenuation low to -55DB, was -130DB. Bitwide low to 16bit , was 24 bit. While active this function, I are advice setting to OS2 or OS4 mode. But infact, this function can working with any setting mode.

Display :
         Active (1)  the display auto dark, the display will become dark in around 10 seconds after stop operate the buttons . Disable (0) the display auto dark, the display  light always.

Selector buttons:
While the display non blink (Don't push the "setting" button at first ), for select the input 1 to input 4.
          While the display blink (Push the "setting" button at first), for setting the digital  functions.


HDMI definitions : (Compatible with PS audio standard)
Pin 1 :       SDATA -                     
Pin 2 :       GND                         
Pin 3 :       SDATA +                    
Pin 4 :       SCLK +                       
Pin 5 :       GND                         
Pin 6 :       SCLK -
Pin 7 :       LRCK -                        
Pin 8 :       GND                         
Pin 9 :       LRCK +
Pin 10:      NC    (Syn version still need the Mclk+ on this pin)           
Pin 11:      GND                         
Pin 12:      NC    (Syn version still need the Mclk- on this pin)   
Pin 13:      NC                            
Pin 14:      NC                           
Pin 15:      NC
Pin 16:      NC                            
Pin 17:      GND                         
Pin 18:      NC
Pin 19:      NC
R1_tda_Asy don't need MLCK input . Even the source has MLCK output but has not effect .

R1_tda_Asy and R1_tda_Syn firmwares
What's the different between R1_tda_Asy and R1_tda_Syn:
       R1_tda_Asy is the firmware  running in asynchronous mode, after update it can without input the Mclk signal from HDMI-IIS input, regenerative inside by the Accusilicon clocks.
       R1_tda_Syn is the firmware running in synchronous  mode, it still need the Mclk signal from HDMI-IIS input.
        Some users may don't concern the technology different, they just concern the sound and they know the technology advantage don't mean the sound better .
       In the simple, you can consider R1_tda_Asy is the Accurate version and the R1_tda_Syn is the Smooth version.
Firmware update guide:
R1 update guide (R1update guide same as R8)



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