Dev
MusicTools dev notes: how I built each feature, what went wrong on the way, and a few lines of code you can run to see it work.
[MusicTools dev note] Why setTimeout Can't Keep Time: A JavaScript Metronome on the Audio Clock
My app's metronome stuttered on a real iPhone. Why a setTimeout metronome can't keep a beat, how booking clicks on the Web Audio clock fixed it, and code to hear it.
[MusicTools dev note] Turning Pages with a Wink: ARKit on iPad, MediaPipe on Android
How my score app tells a wink from a blink to turn sheet music pages hands-free, with ARKit on iPad and MediaPipe on Android, plus a webcam demo you can run.
[MusicTools dev note] The Feature I Threw Away: Detecting Chords from an MP3
I built chord detection from audio for my music app in a day. It passed every test on synthesized songs and failed on real ones. What I built, and code that shows why.
[MusicTools dev note] adb Shows "emulator-5562" That Doesn't Exist
expo start failed on an emulator-5562 I never started. The cause was Native Instruments' NTKDaemon on port 5563. How to find what's on the port, and the adb fix.
