This USB digital interface is independently developed by the XING digital audio technology group and has completely independent intellectual property rights. Supports DSD and PCM audio. Lossless output SACD, CD, DXD, DVD Audio. Up to PCM1536K and DSD1024 are supported. It is mainly composed of three chips, USB3300 is responsible for physical transmission of USB data, STM32F446 (ARM Cortex-M4 180MHz) is responsible for master control and audio buffering, and ALTERA CPLD is responsible for audio signal output. Absolute physical isolation is formed between chips, which does not scramble for resources from each other and does not constitute interference. This is different from the single-chip solution, and it is also an important symbol of high-quality digital interface. This interface uses a 2520 small package ultra-low phase noise audio dedicated crystal oscillator, with image noise 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 exerted.
The 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. VID and PID and device strings can also be written arbitrarily, so as to adapt to any standard USB2.0 audio driver.
The supported formats and sampling rates are as follows: 32-bit PCM (downward compatible with 24-bit, 16-bit) format supports 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 can be transmitted without loss in DoP (DSD64~512) or Native (DSD64~1024) protocols.
User manual download link: https://pan.baidu.com/s/1ERGTWKHxlsIf2h4denwi5w
Supported operating systems are:
Windows XP, Windows Vista, Windows 7 and Windows 8 require the installation of a generic third-party USB Audio 2.0 driver that supports all audio formats and sample rates.
The Windows 10 system comes with a USB audio 2.0 driver that supports the DSD format of the PCM and DoP protocols. All audio formats and sample rates are supported when a generic third-party USB Audio 2.0 driver is installed.
Mac OS comes with USB Audio 2.0 driver that supports DSD format of PCM and DoP protocol.
iOS7 and later versions come with USB audio 2.0 driver, which can support DSD format of PCM and DoP protocol.
Android 5.0 and later versions come with USB Audio 2.0 drivers that support all audio formats and sample rates.
Linux system (with UAC2 kernel driver module mounted), including Volumio, Moode and Daphile, etc., can support all audio formats and sample rates.