This USB digital interface is independently developed by XING Digital Audio Technology Group and has completely independent 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 Cortex-M4 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 individually 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, PID, 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 DoP (DSD64~512) or Native (DSD64~1024) protocol.
User manual download link: https://pan.baidu.com/s/1ERGTWKHxlsIf2h4denwi5w
The supported operating systems are:
Windows XP, Windows Vista, Windows 7 and Windows 8 need to install a general third-party USB audio 2.0 driver, which can support all audio formats and sample rates.
Windows 10 system comes with USB audio 2.0 driver, which can support DSD format of PCM and DoP protocol. When a general third-party USB audio 2.0 driver is installed, all audio formats and sampling rates can be supported.
Mac OS comes with USB audio 2.0 driver, which can support DSD format of PCM and DoP protocol.
The USB audio 2.0 driver is included in iOS7 and subsequent versions, which supports the DSD format of PCM and DoP protocols.
The USB audio 2.0 driver comes with Android 5.0 and subsequent versions, which can support all audio formats and sample rates.
Linux system (when the UAC2 kernel driver module is mounted), including Volumio, Moode and Daphile, etc., can support all audio formats and sample rates