Pitch Generator Online

The international standard concert pitch is A4 = 440 Hz, adopted by the International Organization for Standardization (ISO 16) in 1955. Many orchestras tune to A = 442 Hz or even 443–444 Hz for a slightly brighter sound. Early music ensembles sometimes use A = 415 Hz (approximately a semitone lower). The pitch generator lets you set any of these reference pitches precisely.

Yes, but take care with high-frequency tones above 4000 Hz and any tone at high volume. Start with the volume slider at around 30% and raise it gradually. Very high frequencies (above 8000 Hz) can be uncomfortable at high volumes, and sustained loud tones through headphones carry the same hearing risk as any loud sound. Use short bursts rather than long sustained tones when testing high frequencies.

A pitch generator is a classic ear training tool. Set it to A4 (440 Hz) and try to match it by singing. Then move to other notes — E4 (329 Hz), D4 (294 Hz) — and practice recognizing the intervals between them. Advanced ear training involves identifying intervals, matching chords, and recognizing whether a played note is sharp or flat relative to the reference. Repeat these exercises daily for the fastest improvement.

A sine wave produces a pure, flute-like tone with no harmonics — it is the clearest reference for tuning. A square wave adds odd-numbered harmonics and sounds hollow and buzzy, like a clarinet or early synthesizer. A sawtooth wave contains all harmonics and sounds bright and rich, similar to a string or brass instrument. For tuning reference, use sine. For sound testing and synthesis experiments, try the other waveforms.

The standard equal-temperament scale assigns specific frequencies to each note. Common references: C4 (middle C) = 261.63 Hz, A4 = 440 Hz, E4 = 329.63 Hz, G4 = 392 Hz, B4 = 493.88 Hz. Each octave doubles the frequency, so A5 = 880 Hz and A3 = 220 Hz. The pitch generator displays the nearest note name as you move the slider, making it easy to find any reference pitch.

Yes. A sweep from 20 Hz to 20000 Hz is a standard speaker frequency response test. Move the slider slowly upward from 20 Hz and listen for which frequencies your speakers or headphones reproduce clearly, which seem weak, and which cause rattles or distortion. Most consumer earbuds roll off below 50 Hz and above 16000 Hz. This test is purely subjective but useful for understanding your equipment.

Middle C — written as C4 in scientific pitch notation — has a standard frequency of 261.63 Hz when tuned to the international A4 = 440 Hz standard. It sits in the middle of the piano keyboard and serves as a common reference point for both singers and instrumentalists. You can verify this on the pitch generator by selecting C4 and confirming the displayed frequency. Note that in older or specialist tuning systems (such as baroque pitch at A4 = 415 Hz) middle C shifts to approximately 247 Hz.

Select the pitch matching the note you want to tune (for example A4 = 440 Hz for a standard A string), then play that note on your instrument and listen carefully for the beating pattern — a rhythmic wavering that occurs when two pitches are close but not identical. Slowly adjust your instrument's tuning peg until the beating disappears and the two tones merge into a single, stable sound. This method is called tuning by ear to a reference tone and works on any instrument, including guitar, violin, and wind instruments, without needing any microphone access.

The typical human hearing range spans from approximately 20 Hz to 20,000 Hz (20 kHz). The lowest audible bass frequencies (20–80 Hz) are felt as much as heard; the critical range for speech and music is roughly 200 Hz to 4,000 Hz; and the upper range above 8,000 Hz carries the 'air' and shimmer of high-frequency content. Hearing sensitivity at high frequencies decreases with age — many adults over 40 cannot reliably hear above 15,000 Hz. Use the pitch generator to explore which frequencies you can personally detect.

Yes. Generate a steady reference pitch for a specific note, then play the same note on your instrument. If the intonation is correct, the two tones will fuse into a stable sound with no wavering. If you hear a slow pulsing (beating), the instrument is slightly out of tune at that pitch. By checking multiple notes across the fretboard or across different octaves you can identify intonation problems — for example, a guitar saddle that needs adjusting or a wind instrument that plays sharp in the upper register.

A4 = 440 Hz. C4 = 261.6 Hz. G4 = 392 Hz. Other notes follow by doubling or halving per octave.

No. Always press Stop when finished to avoid listener fatigue.