v1.6.0

Mic level

Route a live microphone through a gain and analyser with an RMS meter.

npx web-audio-api mic gain=0.8
gain=<number>
input gain
rate=<hz>
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

45Sound recorderCapture microphone audio with a live level meter and save a recording.Capture 35Speaker hello worldPlay the smallest useful realtime graph through the system output.Create 36LFO tremoloConnect an oscillator to an AudioParam and modulate gain at audio-clock precision.Create 37Spatial panningMove a source from left to right through three-dimensional space.Create

This is a live microphone level meter: it routes the mic through a gain and an AnalyserNode with an RMS meter, letting you check input levels and set gain before recording. Run it in the browser, where monitoring stays muted to prevent feedback, or from the Node CLI, which can route the graph to speakers.