J Arbona-san,
Thank you for a reply.
I appended to SystemSettingsCord your script.
Now I am testing it.
The signal pass of AS1 to AS2 is good, but a signal conflict occurred on DOUT1 pin.
It may be a problem only for my EVM, because my EVM cannot play the music of PC via USB now.
However, the DAC of my EVM outputs the signal when I input I2S signal into headers of AS1 directly.
regards,
Ito