I'm planning to build an audio mixer using Wondom ADAU1701 and I want to get an audio signal from multiple devices from I2S, one ADC converter which are CS5343 (I need to give extra since the ADAU1701 DSP only have 2 ADC). The other audio signal is from HDMI converter which I use WM8804 to get I2S at the end. However, the CS5343 & WM8804 will give 2 signal of I2S to my ADAU1701 which confuse me, and not sure how to combine them. I see through the internet that we can get multiple I2S device data but only need to make sure they have the same clock, is this right? Or is there another way?
The ADAU1701 can support up to three I2S inputs. I suggest you read (and re-read) the "Multipurpose Pins" section of the ADAU1701 datasheet. Your SigmaStudio program will either have to select between your three inputs (ADC and two I2S) or just mix them together. The ADAU1701 has to supply the master clock to the I2S devices, so your I2S devices have to support slave mode. You also need to wrap two ADAU1701 I2S outputs to your I2S input lines. That's also covered in the "Multipurpose Pins" section. Good luck and be willing to spend some time sorting things out.