Pro Online Metronome & Tap Tempo Studio
Sample-accurate audio scheduling eliminates JavaScript event loop drift. Supports 20–300 BPM, visual pendulum swing, subdivisions, and tap tempo detector.
How Sample-Accurate Web Audio Scheduling Prevents Timer Drift
Standard web timer functions like setInterval() and setTimeout() are notoriously unreliable for musical applications. Because JavaScript runs on a single event-driven execution thread, any DOM manipulation, garbage collection cycle, or inactive background browser tab can delay scheduled timers by dozens of milliseconds, causing the metronome to stutter and lose sync.
A tight 25ms timer queries audioCtx.currentTime and queues all clicks occurring within the next 100 milliseconds directly onto the audio hardware subsystem.
Calculates the harmonic average of tap timestamps across a rolling 3-second window, rejecting outliers to provide instant tempo discovery for any song or rhythm.
Pure sine wave synthesis at exact international concert pitch A4 = 440 Hz (standard ISO 16) and Verdi tuning A4 = 432 Hz for quick acoustic string calibration.
Interactive Musical Instruments & Studio
All InstrumentsVirtual Studio Piano & Synthesizer
Play 2 full octaves of realistic grand piano, rhodes, and 8-bit chiptune with your computer keyboard or touch. Record melodies live with low-latency Web Audio.
Virtual Drum Kit & Beat Machine
100% native synthesized acoustic drum kit and 16-step beat sequencer. Play kick, snare, hi-hats, toms, and crash cymbals with your keyboard.
Interactive Guitar Tuner & Pitch Detector
Tune acoustic, electric, and bass guitars with client-side microphone pitch detection using autocorrelation, plus reference pitch synthesizer.