Making Your Arduino Ding

There's a moment in every hardware project where you think "this should be simple" — and then you spend an evening down a rabbit hole of SPI buses, voltage dividers, and audio formats you've never heard of. Adding WAV playback to my Arduino quiz buzzer was exactly that kind of evening. But it worked, and it was genuinely satisfying. Here's how it went. The Project That Needed a Voice I'd been…