Free Audio Tools

Yes. The Guitar Tuner uses the Web Audio API to capture microphone input and analyze the pitch using autocorrelation. You must grant microphone permission when prompted. No audio is sent to any server — all processing is local.

The Metronome supports common time signatures: 2/4, 3/4, 4/4, 5/4, 6/8, 7/8 and custom settings. The first beat of each bar is emphasized with a different click sound. BPM range is 20 to 300.

The Audio Recorder exports audio in WebM (Opus codec) by default in most browsers, or OGG in Firefox. Some browsers support MP3 export. All recordings are processed locally — your audio is not uploaded anywhere.

White noise has equal energy at all frequencies — like a TV static hiss. Pink noise decreases in energy as frequency increases — like a waterfall. Brown (red) noise decreases even more sharply — like a deep rumble. Pink and brown noise are more comfortable for sleep and focus because they are less harsh than white noise.

Yes. The Tone Generator is commonly used for speaker and headphone testing. Generate a sweep tone (gradually increasing frequency) to identify resonances or dead spots in speakers. The sine wave mode is cleanest for frequency testing.

Tap the button or any key at least 4 times to get an accurate average BPM. The tool averages the time intervals between taps for increasing accuracy as you tap more. After 8+ taps, the BPM reading stabilizes to within ±1 BPM for most human tapping.

Yes. The Online Piano supports multiple simultaneous notes using the computer keyboard. Each keyboard key maps to a piano key so you can play chords by pressing multiple keys at once. The note sustain duration can be adjusted in settings.

The Audio Visualizer uses the Web Audio API AnalyserNode to display a real-time frequency spectrum (FFT) and/or waveform from microphone input. It is useful for seeing which frequency ranges are present in a sound, checking microphone quality and as a visual aid for music.