I Built a Free Audio Normalizer So I Could Quit CapCut

CapCut charges to smooth out your audio. So I built my own audio normalizer, for free, and added it to my video tool. This is part 4 of building my own content tool in public. I'm a software engineer, and in this one I do a prompt-by-prompt build with ChatGPT Codex: I add an audio normalizer (the thing that evens out your voice when you get too loud or too quiet) to the Content Command Center, right alongside the transcript editor and the caption generator. Along the way I let the AI teach me how audio loudness actually works, and I share the workflow principles I use on every build. The whole thing runs on your machine and the code is free. Download it, change it, ship your own. Free code on GitHub: https://github.com/vibecodeguild/Auto... Join the Guild (we vibe code together, 100% free): https://skool.com/vibecodeguild Chapters: 0:00 The feature CapCut charges for 1:08 Prompting Codex (and letting it teach me) 2:52 Loudness vs dynamic normalization 6:05 Building the normalizer (the 3rd tool) 7:55 Testing it and adding a live preview 10:16 The bugs (and why I run my own dev server) 15:21 The tongue-twister demo 16:20 Free on GitHub and what's next