Raspberry Pi WS2801 to WS2811 Converter

Hi guys

I have recently got a raspberry pi and correct me if wrong but they cant output WS2811 Led control signal. So would anyone know if i can use a Arduino to convert SPI from the Raspberry pi to the WS2811 that I need.

I haven’t had much to do with SPI (None what so ever) so let me know if its possible.