Clock syncing between usb boards

[breadbanana]

Probably my question is more about usb than XMOS specifically:
When using multiple usb boards, there is any mechanism to sync them? like make one act as a master clock source and other as a slave?
For my understand the mechanisms to sync clock already exists via hardware and software as this is need for spdif / aes stuff? i'm wrong?

So is it possible to sync the clocks between two usb boards with xmos devices?

Thanks in advance

[Ross]

Without modding boards, the easiest way is S/PDIF (or ADAT) as you mention. Connect the transmit of one to the receive of another. For the receive board select the appropriate clock source in the host control panel.

This is possible as the device (by default) is a async usb audio device. (I’m assuming you’re asking about the usb audio reference design here).

If you’re playing with hardware you could just bridge the master clock from one to the other directly.

Think you need to let us know exactly what your use case is before we can give much useful advice.