v1.6.0

Chromatic tuner

Estimate microphone pitch, nearest note, and tuning error in cents.

npx web-audio-api tuner 440
a=<hz>
reference pitch for A4
rate=<hz>
microphone sample rate (default: 44100)
ch=<number>
input channels (default: 1)
bit=<number>
input PCM bit depth (default: 16)
backend=<name>
@audio/mic backend: miniaudio/auto or process
ready

Other examples

03Latency testerPlay short clicks through the speakers and time their return through the microphone to measure round-trip latency.Measure 04Level meterShow live microphone RMS and peak level in dBFS, uncalibrated, with fast or slow meter ballistics.Measure 01MetronomeSchedule a click pattern with accents, rests, tempo control, and instrument presets.Create

It works as an online chromatic tuner and pitch detector: play a note into the microphone and it reports the frequency, the nearest note, and how many cents you are off. The browser demo listens live, and the Node CLI runs the identical YIN-based pitch detector against @audio/mic for tuning a guitar or any monophonic instrument from a terminal.