(Sponsored) Audio Compressor Software Implementation (STM32 DSP) - Phil's lab #157

Discover Easy, Affordable, and Reliable PCB manufacturing with JLCPCB! Register to get $70 New customer coupons: https://jlcpcb.com/?from=PhilsLab (AD: This video includes a paid promotion for JLCPCB and Altium.) Basics of audio dynamic range compressors, covering their individual functional blocks (envelope detector, gain computer, attack and release) and DSP theory, and implementation in software on an STM32H7 microcontroller. Audio examples using an electric guitar. [SUPPORT] Hardware design courses: https://phils-lab-shop.fedevel.education Course content: https://www.phils-lab.net/courses Patreon: https://www.patreon.com/phils94 [GIT] https://github.com/pms67 [SOCIAL] Instagram: https://instagram.com/philslabyt [LINKS] Recursive Moving RMS Video: https://www.youtube.com/watch?v=miUXBXUDJDI DSP Playlist: https://www.youtube.com/playlist?list=PLXSyc11qLa1ZCn0JCnaaXOWN6Z46rK9jd MATLAB Compressor: https://de.mathworks.com/help/audio/ref/compressor-system-object.html Gain Computer Static Non-Linearity Interactive Graph: https://www.desmos.com/calculator/wkmkrmn9le [TIMESTAMPS] 00:00 Intro 00:57 JLCPCB (Ad) 02:02 Altium 365 (Ad) 03:08 Basics 05:34 Block Diagram 08:26 Envelope Detector 10:50 Gain Computer 13:20 Interactive Graph 15:06 Attack & Release (Gain Smoothing) 18:41 Make-Up Gain & Gain Adjustment 19:58 Firmware 21:27 Firmware Parameters 22:24 Firmware Init() 22:54 Firmware Update() 26:41 main.c 27:41 Control Test 31:25 Guitar Playthrough 32:11 Outro