Using ADAU1761 for microphone beamforming

We used an ADAU1761 to create a simple microphone beamforming application, with two omnidirectional ADMP504 MEMS microphones mounted in an endfire configuration. Using the attached Excel sheet to perform the calculations, we calculated that a total of 6 samples of delay are required to generate a delay appropriate for a microphone spacing of 42 mm at a sample rate of 48 kHz. Distance between microphones (mm) 42 Speed of sound (mm per sample @ 48 kHz) 7 Samples to cover microphone distance @ 48 kHz 6 The following project was created to realize the signal flow. Reference materials: Microphone Beamforming Application Note ADMP504 MEMS Microphone Datasheet ADAU1761 Datasheet Attachments: ez.analog.com/.../1667.ADAU1761_5F00_Audio_5F00_CardiodBeamforming_5F00_42mm_5F00_48kHz.dspproj.zip

ADAU1761: Can I connect one analog and one digital input channel to the ADAU1761 and process both of them together?

Q I need only left channel of SPDIF audio and microphone in same time. It is possible to configure codec to work in this way (analogue audio – MIC and left or right channel from digital input )? A Yes, you can connect both one analog and one digital input channel to the ADAU1761 and process both of them together. If you are using the serial digital input port, you should ensure that the serial port is synchronized with the master clock that is sent to the codec.