The Simplest Digital Filter (STM32 Implementation) - Phil's Lab #92

How to implement a simple digital filter (low-pass and high-pass exponential moving average (EMA)) on a real-time embedded system (STM32 + audio codec). Useful for noise reduction, removing DC offsets, and more in simple situations.
Discussion on filter basics, advantages & disadvantages, theory, implementation in C, and real-time time- and frequency-domain tests.

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[TIMESTAMPS]
00:00 Introduction

00:44 Altium Designer Free Trial

01:15 What We'll Look At
01:47 EMA Filter Basics
03:40 Digital Filter Basics

05:03 Low-Pass Filter Theory
08:36 Filter Coefficient Effect on Frequency Response (Alpha)
09:57 Software Implementation in C (Low-Pass)
13:11 Low-Pass Filter Real-Time Test

16:39 High-Pass Filter Theory
18:32 Filter Coefficient Effect on Frequency Response (Beta)
19:11 Software Implementation in C (High-Pass)
20:23 High-Pass Filter Real-Time Test

23:04 Outro