A couple of years ago I made about 10 of those ADAU1701 shield boards, as I thought I might need them for the DSP Test Bed Project that never happened. If anyone wants to buy those boards, they are available for $40 each. Or, you can buy a completed assembly with an Arduino Uno board, the shield board and an LCD/keypad board, with working code installed for $60. The details are at this URL: Arduino Shield / Clearance Sale – Audiodevelopers Reborn