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Maximum audio frequency with AD1940 and Sigma Studio?


I am going to make some audio signal processing on ultrasonic audio signals, mainly in the frequency range from 20 kHz to 40 kHz.

I would like to do some preliminary filtering expirements, and i was planing to use the AD1940 SigmaDSP Using the EVAL-AD1940MINIBZevaluation board and the Sigma Studio package.

Is this possible for me, i will the above configuration work at frequencies above 20 kHz, and can i define filters in Sigma Studio above 20 kHz, and is the AD1940 fast enough?

Also, i am concerned if there are anti alizing filters in the analoug input on the evaluation board, the will limit my audio band with?

Thank you very much