Invention in Barok Era and The Development of Piano Lesson. In piano lesson. one material of parts towhich had been given is polyphony. which is an Invention from J. https://www.roneverhart.com/HP-Pavilion-15-eg2373cl-15-6-FHD-Touch-Laptop-Intel-Core-i7-1255U-3-50-GHz-GeForce-MX550-16GB-DDR4-512GB-SSD-Windows--p8309/