After all you have done to solve it. I still suspect it is an I2S issue.
- Be sure that the cables are okay. I2S is very sensitive depending on good connection.
2.To show you what problem I had with the settings in APCWorkbanch. I uploaded these two pictures to make it clear. Take a close look at the setting of “PLL Clock1”. In the distorted picture “PLL Clock2” is active, but “PLL Clock1” is selected. So, be sure that you click with your mouse on “PLL Clock1”, EVEN if it seems to be selected.