Please note:
The product even had burn in over 300 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.
The product had the pure class A analog amps and PSUs design, we are not recommend stack
other products on its top directly, it need least 3CM room on its
top side. Also we are not recommend stack it on the top of other hot
products , it should place on the shelf .
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 .
R7_tda firmwares
Function introduce :
The DAC can setting the digital
process functions on front plate to change the sound flavors, without open the unit .
Since 20th. Mar. 2019 the
unit built in tda_asy firmware. The older V3 firmware function
introduce please click to read it
R7_V3 firmwares function
introduce.
Important warn:
Before push the
"Setting" button,
I 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 :
Push the
"Setting" button one
time, the one digit display will blink for active the function
setting , push the right "Selector" button can change function . While
the display blink, push "Setting" again , the right next
one digit display
will blink , push the left "Selector" button the left next one digit
display will blink .
While the "Dis" LED blink, push
the "Setting" one time , the menu will change to menu page 2.
Left Selector buttons:
While
the display non blink, for select the input sources.
While the display blink,
for the setting digit move one left.
Right Selector buttons:
While
the display non blink, for select the input sources.
While the display blink, for
setting the digital process functions.
Menu Page 1:
OS (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, loIr 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.
Dith (Dither) :
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.
Di (Display) :
Active (1) the display
auto dark, the display will become dark in around 10 seconds after
stop operate any buttons . Disable (0) the display auto dark, the display light
always.
Menu Page 2:
1st number (non function in the Asy
version) :
For the 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) .
2nd
number (non function in the Asy version) :
For the Syn version if user want to replace other brands USB module
in the unit, user can setting the 2nd number ON (1) or OFF (0) to
find the best match .In default is OFF (0) .
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
R7_tda_Asy don't need MLCK input . Even the
source has MLCK output but has not effect .
R7_tda_Asy and R7_tda_Syn firmwares
(Support up to 768K at NOS mode)
What's the different between R7_tda_Asy and R7_tda_Syn:
R7_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.
R7_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 R7_tda_Asy is the Accurate version
and the R7_tda_Syn is the Smooth version.
Upgrade Port :
The DAC can through an USB cable
connect betIen computer and "Upgrade Port" to upgrade the firmware
for improve the sound quality or performance .
Firmware update guide:
R7 update
guide
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