In the previous figure the AXIS traffic generator provides a path to the AI Engine input via a sim_ipc IP core. You will see this IP core on the BD in a later step. The AI Engine array has multiple AXI streaming inputs but for this tutorial you will use just one. Different application requirements such as precision and throughput will use different data types and PLIO widths. For example, the cint16 datatype often maximizes AI Engine compute capabilities while floating point datatypes provide the most dynamic range. The traffic generator XO files see all data as byte arrays of different widths based on the PLIO width and the corresponding XO file linked with v++. For this tutorial, you will send an array of complex 16-bit integers into the AI Engine array and perform a Fast Fourier Transform (FFT) using the DSP Library for AI Engine.