Does this new driver from XMOS issue the same 30s eval tone?
They do! The drivers are made from Thesycon in Germany and until now, only 2.24 version were paid from Khadas to use them full, they have made since, the version 4.54.
I hope Khadas will purchase those new versions and upload them, since the drivers from other vendors will not work even if they are full. They should be registered to Pid and Vid of Khadas.