I’m trying to implement spectrum analyzer on stm32f303 + ili9341 + freertos. (So one task runs lvgl and the logic is in other tasks). I want to implement an audio spectrum analyzer like in this video Teensy 4.0 and LittlevGL - YouTube (where he plays music). How to do it with LVGL? I tried doing it with Line Widget, so each bar is a line and it is super slow even if I have only 40 bars. Is there other way?