projects

Sound Test

2026 · live · github

Sound Test is a browser-based audio testing tool for checking speakers, headphones, and microphones, built with Svelte 5 and the Web Audio API.

I built it so I stop putting the wrong earbud in the wrong ear. It covers left-right identification, speaker polarity, a live microphone volume meter, and a 20 Hz to 20 kHz frequency sweep.

Technical Details

  • Svelte 5 with runes for reactive audio state
  • Web Audio API (OscillatorNode, AnalyserNode)
  • Zero dependencies beyond Svelte itself