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”.


1 Like

@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:

1 Like

Is there any reason for using the 4.1 Eval version to update the board? Is it not enough the TUSBAudioDfu.exe file installed with the v2.24 drivers?