XMOS: XU208-128-QF48, Eeight Cores, Core Share up to 500 MIPS; ES9038Q2M 32-Bit Stereo Mobile Audio DAC. Compatibility: Windows PC, Mac OS, Android, Linux PC, Volumio, LibreELEC, and Other SBCs. The XMOS USB Audio to ensure a rock-solid connection. We selected to use the XMOS XU208 microcontroller for its stability, powerful functionality,and its reliability. You can be sure that the Tone Board will just work when connected to most audio sources,such as computers and mobile media terminals. Different Versions: VIMs Versions (Khadas Tone + VIMs) connected through GPIO Pins; Generic Edition won't have GPIO Pins on board. Extension: One 30-Pins FPC Connector for 8 Channels Analog Output Extension; Two 10-Pins FPC Connectors for OLED Display and I2S Extension; VIMs Version also have 40-Pins Female header connecting with VIMS and 20-Pins SMT Header for debugging XMOS and VIMs. Ultra-low Phase Noise Clock Jitter: The SiTime ultra performance oscillator SiT820&8209 series with just 0.5ps phase jitter and output frequency stability as low as ± 10PPM. We chose it as a reference clock in our audio system so that the data clock jitter < 30ps. Khadas Tone Board High Resolution USB DAC Designed for Music Fanatic.
Khadas Tone Board is an Amazing USB External HIFI Sound Card in Khadas Family.
Its Excellent Performance and Compatibility Will Takes the Listening Experience into a Whole New Level.
And that’s Just the Beginning…

1. XMOS
XU208-128-QF48: 8 xCores, Core Share up to 500 MIPS
2. DAC
ES9038Q2M: 32-Bit Stereo Mobile Audio DAC
3. THD+N ≤ 0.000337% @1KHz
4. SNR ≥ 120dB @ 10Hz~20KHz
5. DNR ≥ 120dB @ 10Hz~20KHz
6. Crosstalk ≥ 127dB @ 10Hz~20KHz
7. Frequency Response ±0.08 dB @ 10Hz~20KHz
8. Sample Rate:
PCM: Up to 768KHz @ 32bit ;
DSD: Up to DSD256 @ 1bit
9. Clock Jitter:
Reference Clock Jitter < 3ps ;
Data Clock Jitter < 30 ps
10. Audio Formats: APE2/FLAC/OGG/WAV/ACC/ALAC/MP3/WMA…
11. Line Out:
1x Red RCA for Right Channel,
1 x White RCA for Left Channel
12. Indicator: White LED x1
13. Mounting Holes: Size M2 x 5
14. FPC Connector: 30-Pin 0.5mm Pitch: for 8 Channels Extension
15. FPC Connectors:
10-Pin 0.5mm Pitch: for VIMs I2S Extension；
10-Pin 0.5mm Pitch: for OLED Display
16. S/PDIF IN: Up to 192KHz
17. S/PDIF OUT: Supported
18. USB-C Port
19. 40-PIN Header: Generic Version Not Solder
20. 20-PIN Header: Generic Version Not Solder
21. Dimensions: 82.0 x 74.5 x 24.0 mm
22. Compatibility:
23. In the Box: Tone Board VIMs Edition; Screws set; Type-C Cable
24. Others:
Android support only 44.1KHz output due to the Sample Rate Conversion(SRC) resampling implementations.
Should also support other Single Board Computers(SBCs)