Adaptive Beamformer in SigmaStudio

Hi,

I am new in SigmaDSP. Now I am trying to use the adaptive beamformer in SigmaStudio based on the example provided by Adaptive Beam Forming [Analog Devices Wiki]

The screenshot of the block diagram is shown below. The chip I am using is ADAU1442. Since my inputs are coming from a speech in the computer, they are actually identical. To test the beamformer, I manually added a delay block to model the signal arrived in different directions. However, no matter what delay value I set in the delay block, the beamformer always produced the best output when the delay variable for the left channel was set to 9 (i.e. Single 1 block was set to 9). Why does this happen?

In addition, when I set my delay to be (for example) 2, I can also get a good output when the left channel delay for the beamformer is set to 2. According to the official description, the right channel has a fixed delay 8. From my understanding, I should get a good result when the left channel delay is set to 10 instead of 2. Is there anything wrong with my understanding?

Thanks and best regards,

Jerry

Audio Signal Processors

adau1442

sigmastudio

SigmaDSP Audio Processors

adaptive

SigmaDSP

beamfoming

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