DIY Lo-Fi Sampler With An ESP32: Part 4 - Sample Playback!

We're back with Part 4 of building a DIY lo-fi sampler using an ESP32! In this episode, we focus on audio playback—turning those crunchy 8-bit recordings into actual sound. We walk through a basic op-amp gain stage using the LM358, level shifting, and some minor hardware tweaks to get cleaner signal into the ESP32. Then we dig into the code to handle audio playback through the DAC. 🔗 Read the accompanying article and grab the code on Medium:   / building-a-diy-casio-sk-1-style-sampler-wi...   Topics covered: LM358 op amp gain stage Level shifting microphone signal Playback using ESP32 DAC (pin 25) Memory optimizations using 8-bit integers Looping sample playback Setup for future keypad-controlled pitch playback ⏱️ *Timestamps* 0:00 - Introduction 1:22 - Breadboarding Preamp Circuit 4:05 - Code Walk-through for Recording and Playing A Sample 6:58 - Sampling Test 8:03 - Outro Patreon →   / makingmygear   Discord →   / discord   Instagram →   / makingmygear   TikTok →   / makingmygear