Tone Board v1.02 Firmware Update


Khadas Tone Board DFU 2019-03-19 Upgrade Notes:

  1. Upgraded the XMOS firmware version to v1.02.
  2. Fixed issue with Tone Boards getting bricked after firmware upgrading.

Firmware v1.02 Download Links:

  2. Google Docs (Alternative)

Upgrade Instructions:

Known Issues:

  • Firmware failed to be upgraded via Mac OS X.
  • Bricked boards may need more preparation before flashing (refer to picture).


  • Check USB-C Cable
  • Check USB Port
  • Check Connections
  • Check Computer
  • Check Windows Driver [Normal] [For Upgrading]

Max Supported Sampling Frequencies:

  • PCM: Up to 384KHz @ 32bit
  • DSD: Up to DSD256 @ 1bit

Finding Out Firmware Version:

You can find out the firmware version using the “Firmware Upgrade Tool for Windows 10”.


Not working in windows 10
Firmware upgrade with Eval drivers?
DSD distortion noise on Toneboard
BIG PROBLEM with tone board-music stop after few secc
No sound after firmware upgrading
BIG PROBLEM with tone board-music stop after few secc

@tsangyoujun any chance we can upgrade via OSX?


You can attempt an upgrade via OS X. However it didn’t work on my end - The OS X upgrade software isn’t well written, according to @terry.


From the spec, it was said tone board can support pcm 32bit 768khz, why the new firmware only supports 32bit 384khz, what I missed here?


The original spec was in error, we have since corrected it on as well.


Hi youjun,

Why khadas cannot support 768khz? Is that a limitation from hardware, oscillator?


@terry can explain better than I can.


Hi @tsangyoujun

Is there by chance planned any upgrade to newer version of USB drivers for example 4.xx series? :wink: This would be fantastic since there are active firmware made :wink: