We designed a new mic array to build an open source smart speaker, you may wonder what it looks like. So we  created a simple 3D model to show a preview of the smart speaker. The model is created with 3D Builder of Windows 10. You can find the model at https://cdn.hackaday.io/files/1642217026031264/speaker1.3mf

Top view - 4 R/Y/G/B LEDs, 1 touch pad

Side view

Front view