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PCM4222EVM: Noise/Hiss at higher sampling rates

Part Number: PCM4222EVM
Other Parts Discussed in Thread: DIT4192, PCM4222

Hi,

I am getting a clearly audible white-noise/hiss when I have selected higher sampling rates on the PCM4222EVM.

44.1 and 48hkz are fine, but selecting dual speed or quad speed on the PCM4222, and corresponding  setting for the dit4192, I get some noise in the background.

What could be causing this? Is this normal?

Thank for your help!