Understanding the result
The selected target compares the live pitch with standard cello C2 G2 D3 A3 tuning at A4 = 440 Hz.
Audio and music
Cello Tuner
Choose the string and bow a steady note. The large instrument's low notes work best in a quiet room.
Detected note—Waiting for microphone
TargetC265.4 Hz
Flat—Sharp
Play one note at a time in a quiet room. A4 reference: 440 Hz.
Targets use A4 = 440 Hz. Avoid large peg changes under string tension.
How to use this tool
- Choose C2, G2, D3 or A3.
- Play one string at a time.
- Adjust gradually until the indicator centers.
Troubleshooting
- Play a long, even note and mute the other strings.
- For low C, place a capable microphone closer and reduce room noise or strong harmonics.
Browser and device limitations
Small device microphones may not capture the lowest fundamental reliably, and the page cannot judge safe peg or string tension.
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Common questions
Why is the low C unstable?
Its low fundamental can be weak on small microphones. Move closer or use a suitable external mic.
Is cello tuned like viola?
Both use C G D A, but cello strings sound one octave lower.
Can I use harmonics to tune?
Harmonics can provide a clear reference, but confirm that the displayed octave and selected string target match your method.