Faceplate functions:
The leftmost display element:
        The selected input, "1" indicates the USB audio input is selected, "2" indicates the coaxial input .
The 2nd display element from the left:
        External/internal clock, "I" indicates the internal clock is selected, "E" indicates the external clock .
Remaining display elements :
         Show the input/output signal sampling rate. For example, with a PCM88.2K signal, the display indicates "88.2" . >>>With a DSD512 signal, it indicates "512" .
"Setting" button :
          Push once to go into the setting menu, the display will be flashing. Settings can then be modified.
"Ext Clk" button :
          Push to toggle between the external and internal clock . While an external clock is connected and powered on, you can select it. This is indicated by the external clock flag being lit (see figure). Otherwise, the external clock cannot be selected.
          Please note : If the external clock lose power, or the cable has bad connect , even though select the external clock,the "E" will become "I" (Switch back in inside clock) automatically for avoid output noise.
"Selector" button :
           Selects the audio input (coaxial or USB) .



Rear plate connectivity :
AES/EBU OUT ：
        AES/EBU output connector（5VPP @ 110 Ohm）。
S/PDIF OUT STD ：
        Standard coaxial output connector, with built-in silver wire isolation transformer. (0.5VPP @ 75 Ohm）.
S/PDIF OUT ACSS ：
         Output using current transmission technology over coaxial （0.5VPP @ 75 Ohm）.
         This output applies the 2nd generation coaxial ACSS technology, which offers even further reduced signal degradation and better sound quality over a coaxial cable .
          In theory, when the DI outputs the current coaxial signal to a DAC using a regular coaxial input, thus receiving the current through a 75Ohms resistor, the signal gets naturally converted to a 0.5VPP voltage coaxial signal. Therefore, most DAC can receive this signal and will benefit from this technology .
         (Note that If the DAC's coaxial input has a built-in transformer, or if the input impedance is not 75 ohm, or if the input sensitivity is not 0.5VPP @ 75Ohm, the ACSS coaxial connection may not work properly ) .
IIS OUT ：
          IIS signal over HDMI output (3.3V LVDS @ 110 Ohm). It only can work with DACs using the exact same pin definition. It can NOT work with mainstream audio/video devices featuring HDMI inputs, and connecting the DI to such devices could damage it, in which case the warranty will not cover the repairs.
CLK OUT ：
         Outputs 256fs main clock or LRCK/WCLK (3.3V LVDS @ 50 Ohm) . User-selectable .
INPUT S/PDIF ：
        RCA 75 Ohm coaxial audio input (0.5VPP @ 75 Ohm) .
INPUT 10MHz ：
        External 10MHz clock input (0.3VPP -3VPP @ 50 Ohm)
INPUT USB ：
        USB audio input（USB2.0/USB3.0）。
UPDATE PORT 10 pins port :
       To connect the Altera Blaster and proceed with an FPGA firmware update from Windows, using the Altera programming software. These updates are meant for upgrading the functionality and/or sound quality .
UPDATE PORT switch :
        For updating the built-in Amanero module's firmware through the USB input.
Amanero firmware download link：
        https://www.amanero.com/combo384_firmware.htm
Amanero firmware update guide :
        Please download the update tool and guide from Amanero's official web . In the official update guide, there is a step requiring that two pads be shorted more than 1 second on the Amanero module , while with the DI-Large, users only need to push the red button for more than 1 second in order to perform the same step . Other update steps are the exact same as in the official guide.
　

Settings function features:
"Setting" button :
         Push once to access the settings menu . The leftmost display element will flash , it means the corresponding setting can be changed by pushing the "Selector" button . While in the settings menu , push the "Setting" button once more to access to next setting to the right, whose display element will then blink.
"Ext Clk" button :
         In the settings menu , push this button to access the next setting to the left .
"Selector" button :
         Push once to change the flashing display element's corresponding setting .
　

The 1st display element :
        "P" (Parallel) means the signal will be processed internally by the 32 bit (PCM) or 64 bit (DSD) parallel mode . "S" (Serial) means the signal will be processed by the serial mode.
The 2nd display element :
        "C" (Clock) means the Clk OUT on the backplate outputs a 256fs main clock , "L" (LRCK/WCLK) means the output is the word clock .
The 3rd display element :
        "n" (Non Swap) means the HDMI outputs DSD with left and right channels following the Audio-gd definition . "S" (Swap) means the DSD left and right channels are inverted .
The 4th display element :
        "1" means the PCM over HDMI i2s output follows Audio-gd's definition . "2" mean the pins definition follows other standard . (Read below for details ).
The 5th display element:
       "A" (Auto) means the display will automatically shut off after around 10 seconds if no buttons are pushed. "n" (Non Auto ) means the display will remain on.

HDMI i2s output definition setting :
HDMI output mode 1:
       The 3rd display element indicates "n" (Non swap) and the 4th indicates "1" (In the setting menu) : i2s out follows the Audio-gd  i2s definition.

HDMI output mode 2:
       The 3rd display element indicates "n" (Non swap) and the 4th indicates "2"  (In the setting menu) :

HDMI output mode 3:
        The 3rd display element indicates  "S" (Swap)  and the 4th indicates "1" (In the setting menu)  :

HDMI output mode 4:
        The 3rd display element indicates  "S" (Swap)  and the 4th indicates "2" (In the setting menu) :