How to calculate audio signal from ADC in DMA using FFT to display on LED 10x10. I have STM32F411 DISCOVERY and connected left and right (2 channels) audio from smartphone. I found this guy https://www.youtube.com/watch?v=3WF4CGKoMas but his code oparate on external I2S 24bit ADC . What values should i use (buffers sizes, samples, etc.)
