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DAC+ADC Pro high frequency output

Hi,

I am trying to reproduce sine waves with 20-40kHz (generated in python using pyaufio, sampling rate 192kHz), but everything over ~23kHz is not being reproduced by the DAC+ADC Pro. Since its datasheets states a frequency response of up to 70kHz, I did not expect that those frequencies would be filtered. Does this shield include such a high-pass filter and if so, is there any possibility to deactivate it?

Thanks.

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