Metronome
Free online metronome with subdivisions, speed trainer, tap tempo, and 6 time signatures.
Use Tool →Music
Practice tools for musicians built on audio standards. Our metronome uses A440 tuning (ISO 16:1975 standard) and Web Audio API (W3C) for sample-accurate timing. BPM detection analyzes audio peaks using onset detection algorithms from music information retrieval research. Chord charts follow standard music theory notation with enharmonic equivalents. All audio processing happens locally—no uploads required.
These tools serve a wide range of musicians — instrumentalists practicing with the metronome at any tempo, vocalists and guitarists tuning to concert pitch, and students developing their ear with interval recognition training. DJs and producers can analyze song tempos instantly with the BPM tapper. The ear pitch trainer applies spaced repetition principles, reinforcing correct identifications over time for more effective learning of intervals, chords, and pitch relationships.
On the audio science side, the tone generator produces pure sine, square, sawtooth, and triangle waveforms using Web Audio API oscillator nodes — each shape has a distinct harmonic profile useful for synthesis and testing. Binaural beats exploit the auditory phenomenon where two slightly different frequencies played in each ear create a perceived third frequency at their difference. The noise machine generates white, pink, and brown noise spectra, each with different energy distributions, for focus, relaxation, and sleep.
BPM Tapper
Tap along to any song to detect its BPM — with real-time averaging and tap history.
Use Tool →Rhythm Trainer
Diagnose and train your sense of rhythm — beat, inner pulse, subdivision, and imitation — with millisecond timing feedback.
Use Tool →Instrument Tuner
Tune your guitar (6/7/12-string), bass (4/5/6-string), ukulele, violin, mandolin, or banjo with 40+ tunings and auto-detected strings.
Use Tool →Online Tone Generator
Free online tone generator, sine wave generator, and pitch generator. Play pure tones from 20 Hz to 20 kHz with 6 waveforms, frequency sweep mode, and WAV export.
Use Tool →Chord Chart
View chord diagrams for guitar and piano with audio playback.
Use Tool →Ear Pitch Trainer
Ear training tool: hear a target note, sing or play it back, and get real-time pitch accuracy feedback.
Use Tool →Can You Hear This?
Discover how high you can hear with this interactive frequency challenge.
Use Tool →Speaker Test
Test your speakers or headphones right in your browser: check left and right channels, stereo balance, bass, full-range sweeps, and speaker polarity.
Use Tool →Voice Recorder
Record from your microphone in the browser — trim, add echo or reverb, and download WAV, MP3, WebM, Opus, or M4A when available.
Use Tool →Sound Level Meter
Measure relative sound levels live from your microphone, with A/Z weighting and Fast/Slow response.
Use Tool →Mains Hum & Ground Loop Tester
Identify electrical hum and ground-loop noise: play a reference 50 or 60 Hz mains hum or buzz and match it by ear against the sound in your system.
Use Tool →DTMF Tone Generator
Free DTMF tone generator with frequency reference table. Play all 16 touch-tone signals (697–1633 Hz), dial sequences, export WAV files, and generate telecom tones.
Use Tool →Binaural Beats Generator
Create binaural beats for sleep, relaxation, focus, and meditation with adjustable frequencies and session timer.
Use Tool →Noise Machine
Free noise generator — mix white, pink, brown, blue, and violet noise for sleep, focus, or relaxation with per-channel volume and timer.
Use Tool →Virtual Piano
Play piano and 5 other instruments in your browser with keyboard, mouse, or touch input and HD sound
Use Tool →Soundscape Generator
Free ambient sound mixer — layer rain, wind, fire, birds, thunder and 100+ procedural sounds with real-time synthesis. 20 presets with Subtle/Balanced/Rich moods, per-layer mixing, and audio-reactive visualizations.
Use Tool →Frequently Asked Questions
What is A440 tuning?
A440 (also known as Stuttgart pitch) means that the note A above middle C vibrates at exactly 440 Hz. This was established as the international tuning standard by the ISO in 1975 (ISO 16:1975). Most orchestras, instruments, and digital tuners worldwide use A440 as their reference pitch.
What is BPM in music?
BPM (Beats Per Minute) measures the tempo or speed of music. Common tempos include Adagio (66–76 BPM), Andante (76–108 BPM), Moderato (108–120 BPM), Allegro (120–156 BPM), and Presto (168–200 BPM). Our BPM tapper lets you tap along to music to detect its tempo in real time.
Do I need to install anything to use these music tools?
No installation is needed. All music tools run in your browser using the Web Audio API (W3C standard). The metronome, tuner, and tone generator all work offline after the initial page load. Just open the tool and start practicing.
What are binaural beats and how do they work?
Binaural beats occur when each ear receives a tone at a slightly different frequency through headphones. Your brain perceives a third tone at the frequency difference between the two. For example, 200 Hz in one ear and 210 Hz in the other creates a perceived 10 Hz beat. Research suggests different beat frequencies may correspond to brainwave states: delta (1–4 Hz, deep sleep), theta (4–8 Hz, meditation), alpha (8–13 Hz, relaxation), and beta (13–30 Hz, focus and alertness). Stereo headphones are required for the effect to work.
What is the difference between white, pink, and brown noise?
White noise has equal energy at every frequency, producing a bright, static-like sound. Pink noise (also called 1/f noise) decreases in power by 3 dB per octave, giving it a more balanced, natural quality — many people compare it to steady rainfall and find it effective for sleep. Brown noise (Brownian or red noise) decreases by 6 dB per octave, resulting in a deeper, rumbling sound similar to distant thunder or a strong wind. Each type is generated mathematically in your browser using the Web Audio API, with no audio files downloaded.