Digital Interface DI-20 Accusilicon 90/98M#

Description#

DI-20 is designed to expand DAC devices. The interface converts the signal in many different configurations with lossless sound quality.



Features:

• Built in the Amanero USB interface that is the most compatible and steady ,during test ,click and change the music track random without any hang , support WIN, OSX, IOS and Linux and had been test with some TV that is based on Android system. (Has not test with Android phone yet ).
• Built in 10MHz external clock input connector .
• Built in main clock/ Wck output connector, the output clock type can set by user.
• USB and Coaxial input (support DOP) can conversion to HDMI-IIS and coaxial output . The coaxial input and output interface had designed in the FPGA but not built in the USB chip, due the high speed of the FPGA so can improve on sound quality and support up to 384K.
• HDMI-IIS output can set the definitions of PCM and DSD through the display menu .
• built in the best sound R core transformer and 13 groups ultra PSU become double stage power supplies, supplys to the different signal parts separately .
• Built in the 150M high speed isolator between USB interface and FPGA signal processor. Because the isolator can effect the data and clock transmit, so the FPGA has corrected the timing to improved on sound quality .
• The USB inteface and FPGA processor have applied the same clocks for avoid the different clocks effect the sound quality .
• FPGA data process mode can select either parallel or series mode . The USB output IIS data is series transmit mode, every data must need one clock cycle to process or transmit, one frame data ( Include L and R data) must need 64 clock cycle to process or transmit, so the data has effect by the 64 clock cycles. But the parallel data process and transmit mode only need one clock cycle can finish the one frame data process and transmit, that can avoid the effect of clock stability. The USB input and the S/Pdif decoder output data has recombine become dual 32bit parallel data once input , and the DSD input has recombine become dual 64bit parallel data once input. The parallel process and transmit mode can improve the sound quality on the transparency and detail but still analog. In the parallel process mode, all data processing by 256fs clock frequency, but not the usual mode that different sampling music data with 64-256fs variable clock frequency. The fixed 256fs clock frequency makes the signal has more exact timing in phase, process with same timing to keep the sound flavor is same.
• Full new configuration clock manage design built in, improved on the clock timing .
• The display can show the sampling of PCM and DSD, and it can as the interface between human and machine, allow user change the setting in the unit .
• Built in USB firmware update button and FPGA firmware update connector, update firmware without open the unit, and support sound quality upgradeable in future.
• The digital data and clock even more easy effect by transmit than the analog signal, cause the DAC sound worse even can not work. So the DI-20 built in multiple strong drive ability chips to drive the different data and clock, to reduces the effect during transmit .
• The 2nd generation ACSS SPdif output design that invented by Kingwa, which offers even further reduced signal degradation and better sound quality over a coaxial cable . The DI-20 also design standard coaxial output connector, with built-in silver wire isolation transformer.