I built a small ESP32 jukebox that reads MP3s straight from an SD card, decodes them on-board, and then sends real I2S digital audio into a proper hi‑fi DAC. The whole point was to avoid the usual microcontroller audio problems—hiss, distortion, and “it technically works but sounds rough.” I used a Frenov ESP32S3 with a breakout board, a PCM5102A-style I2S DAC module, and a tiny 0.96" SSD1306 I2C OLED so the project feels like an actual device instead of just a board making noise. In the video I walk through the wiring choices that actually matter for sound quality, like using the right I2S pins (BCK, LRCK/LCK, and DIN) and making sure the DAC is configured correctly with the solder jumpers—especially the mute/unmute jumper and the I2S format jumper if you’re getting “no sound” or just static. Since the DAC output is line level (aux level), I show two clean ways to get real volume: a PAM8610 class‑D stereo amp driving passive 8Ω speakers with a stable 12V supply, or skipping the amp entirely and plugging the DAC straight into an active speaker’s aux input. I also keep controls beginner-friendly with one button on GPIO4 (short press next, long press previous, triple press stop), plus debounce and adjustable multi-click timing so it behaves like a real jukebox.