You can modify its configuration parameters through the configuration tool software. You first find a win7 computer and install the configuration mode driver. If you use win10, you must turn off the mandatory signature mechanism before installing. The is written in the documentation. Then open the configuration tool. Press and hold the button on the interface without letting go, plug in the USB, and then release the button. At this time, the interface enters the configuration mode. Create a new configuration first, then modify the configuration, then write the configuration, and finally disconnect. Plug and unplug the USB cable again to return to playback mode. This USB digital interface is independently developed by Digital Audio Technology Group and has completely intellectual property rights. Support DSD and PCM audio. Lossless output SACD, CD, DXD, DVD Audio. Supports up to PCM1536K and DSD1024. It is mainly composed of three chips, USB3300 is responsible for the physical transmission of USB data, STM32F446 (ARM - 180MHz) is responsible for main control and audio buffering, and ALTERA CPLD is responsible for audio signal output. The chips form absolute physical isolation, do not grab resources from each other, and do not constitute interference. This is different from a single-chip solution, and it is also an important sign of a high-quality digital interface. This interface uses a 2520 small package ultra-low phase noise audio dedicated crystal oscillator, and the image noise is as low as -158dBc/Hz @100kHz. The CPLD circuit part has also been redesigned, and the clock generation part has been specially optimized, so that the advantages of delicate and transparent can be fully utilized. This interface also opens up a configuration mode for advanced players. The MCLK output frequency can be y configured for any format. From 64Fs to 512FS, from 2.8224MHZ to 49.152MHz, let the DAC chip exert excellent performance. It can also write VID, , and device string arbitrarily, so as to adapt to any standard USB2.0 audio driver. The supported formats and sampling rates are as follows: 32-bit PCM (backward compatible with 24-bit and 16-bit) formats support 44.1KHz, 48KHz, 88.2KHz, 96KHz, 176.4KHz, 192KHz, 352.8KHz, 384KHz, 705.6KHz, 768KHz, 1411.2KHz and 1536KHz sampling rate. The DSD format supports DSD64, DSD128, DSD256, DSD512 and DSD1024, and lossless transmission with (DSD64~512) or Native (DSD64~1024) protocol. Windows Vista, Windows 7 and Windows 8 need to install a general USB audio 2.0 driver, which can support all audio formats and sample rates. system comes with USB audio 2.0 driver, which can support DSD format of PCM and protocol. When a general USB audio 2.0 driver is installed, all audio formats and sampling rates can be supported. OS comes with USB audio 2.0 driver, which can support DSD format of PCM and protocol. Colour:green Material:PC+metal Package Contents: 1 x USB Digital Interface board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.