Studio-Grade Online Ukulele Tuner for Soprano, Concert, Tenor & Baritone Ukulele
Welcome to PluckBench Pro, a studio-grade online ukulele tuner engineered for musicians, music educators, and luthiers who demand reliable pitch calibration directly in the browser. Unlike basic microphone tools that jitter wildly during string pluck attacks, our 4096-sample McLeod Pitch Method (MPM) autocorrelation engine is paired with a 3-stage sustain-phase envelope detector. Whether you are calibrating Soprano, Concert, Tenor & Baritone Ukulele at home, backstage, or in a busy classroom, PluckBench isolates the true sustained fundamental frequency across 146.83 Hz (D3) – 440.00 Hz (A4) with sub-cent visual stability.
Every acoustic player knows that real strings behave dynamically: the initial pick or finger displacement creates a sharp pitch transient before settling into a stable harmonic sustain. By using a string-first workflow inside this online ukulele tuner, you can lock onto any target string on the first screen, trigger reference notes powered by Warm nylon-string physical modeling ukulele pluck synthesis, and wait for the 400ms sustain lock confirmation chime.
For cross-platform convenience, all digital signal processing runs natively via the Web Audio API on desktop laptops, iPad tablets, and iOS or Android phones without installing plugins or uploading microphone audio to external servers. You can also customize concert pitch calibration from A4 = 430 Hz to 450 Hz and switch between 12-Tone Equal Temperament, Just Intonation, and Pythagorean tuning.
Standard Frequencies & Calibration Reference Table
Use the reference chart below alongside the interactive dial meter to verify target note names, scientific pitch octaves, and exact Hertz values (Standard Re-entrant G4-C4-E4-A4, Low G (G3-C4-E4-A4), Baritone (D3-G3-B3-E4)):
| String / Range | Target Note & Octave | Reference Frequency (Hz) | Calibration Mode |
|---|---|---|---|
| 4th String (Top G) | G4 (Re-entrant) / G3 (Low G) | 392.00 Hz / 196.00 Hz | Nylon / Fluorocarbon |
| 3rd String (Lowest Pitch C) | C4 (Middle C) | 261.63 Hz | Core Resonance String |
| 2nd String (E) | E4 | 329.63 Hz | Sweet Major Third |
| 1st String (Bottom A) | A4 (Concert Pitch) | 440.00 Hz | ±1.5 Cent Sustain Lock |
1. Sustain-Phase Pitch Lock Technology
Plucked and bowed strings exhibit a natural pitch envelope. During the first 80 to 120 milliseconds after plucking, string tension spikes and causes a temporary sharp reading. Our sustain-phase tracker automatically filters out the transient attack peak and locks onto the steady decay window so your chord intonation stays true across the entire fretboard.
2. Hardware-Grade Bandpass Noise Shield
Practicing in a shared rehearsal room or near air conditioning can confuse ordinary microphone detectors. When you select a target string and activate Noise Shield in this online ukulele tuner, a narrow high-Q Biquad bandpass filter focuses exclusively on the selected string frequency and rejects non-harmonic room noise.
3. Physical Modeling Reference Timbres
Training your ear while calibrating strings is much easier when the reference note sounds like your real instrument instead of a harsh electronic beep. Click any string button to hear Warm nylon-string physical modeling ukulele pluck synthesis calibrated to your chosen A4 reference pitch (430 Hz – 450 Hz) and musical temperament.
Frequently Asked Questions & Acoustic Calibration Guide
Why is the 4th string (G4) higher in pitch than the 3rd string (C4) on an online ukulele tuner?
Standard soprano, concert, and tenor ukuleles use re-entrant GCEA tuning where the 4th string is tuned to G4 (392.00 Hz), just below the 1st string A4 (440.00 Hz). Clear scientific pitch octave labels ensure you never accidentally over-tighten a string.
Why do new nylon ukulele strings keep going flat after tuning?
Fresh nylon and fluorocarbon ukulele strings stretch for several days. Tune each string up to pitch, gently stretch the string over the soundhole, and re-check with the online ukulele tuner until the sustain lock chime holds steady.
Are Low G and Baritone ukulele presets supported?
Yes. Select Low G (G3-C4-E4-A4) or Baritone (D3-G3-B3-E4) in the preset bar to update both the nylon reference pluck sound and the microphone target frequencies.
Explore All Dedicated Online Instrument Tuners & Music Practice Tools
Switch directly to any specialized preset in the PluckBench suite below: