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
Before push the
we are advice user turn low the amp volume, stop the
music track playing .
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.
"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):
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.
SAA7220 +TDA1541A sound) :
(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.
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
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.
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 .
What's the different between R1_tda_Asy and
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
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
Firmware update guide:
guide (R1update guide
same as R8)