Use kann usb dac funcation,but don't fix iriver DFU. Jriver can use kann usb dac. I think that is driver issue for ak windows 10 driver.

I just only fix USB dac driver. I didn't fix type c driver. I can use foobar and Jriver.You can try again.

Hi I have same usb dac driver issue for windows 10 64bit - digital signature. I use Zadig tool and fix it. 1.Don't install AK kann usb dac for windows 7 driver. 2.Use kann usb dac function and use Zadig tool. I have suggest that AK must be update windows 10 driver.