4 strings · C3 to A4
Viola tuner for standard CGDA and Mozart K.364
Tune viola to standard C3 G3 D4 A4, Mozart K.364 scordatura one semitone higher, or half-step and whole-step-down setups.
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Tuning target±5 cents
C3·G3·D4·A4
FlatIn tuneSharp
Know the target
Standard viola tuning
Standard viola tuning is C3 G3 D4 A4, rising in fifths. The open-string set sits one fifth below standard violin tuning. Begin with a clear pluck or steady bowed note and keep the other strings quiet.
The Mozart K.364 preset raises all four strings by one semitone to C♯3 G♯3 D♯4 A♯4, increasing their tension. Verify the appropriate setup before using this scordatura, and choose the lowered presets only when that is the tuning you intend.
Four clear steps
How to tune accurately
- 1Start at C3 and tune upward through G3 and D4.
- 2Finish with A4 using the fine tuner where available.
- 3For Mozart K.364, raise each string gradually rather than all at once.
- 4Recheck the lowest string after the full set settles.
Reference: A4 = 440 Hz
Notes and frequencies
| Physical string | Target | Frequency |
|---|---|---|
| String 4 | C3 | 130.81 Hz |
| String 3 | G3 | 196.00 Hz |
| String 2 | D4 | 293.66 Hz |
| String 1 | A4 | 440.00 Hz |
Changing the tuner calibration recalculates every target from A4 = 415–450 Hz. The values above use the common 440 Hz reference.
All supported tunings
The instructions and frequency table above describe this page's tuning. These links open other supported setups directly in the live tuner. A separate guide appears only where one has been written.
Standard tuning
C3 · G3 · D4 · A4
Mozart K.364 · +1 semitone
C♯3 · G♯3 · D♯4 · A♯4
Higher tension · tune gradually
Half step down
B2 · F♯3 · C♯4 · G♯4
Whole step down
B♭2 · F3 · C4 · G4
Practical answers
Frequently asked questions
What is standard viola tuning?
From lowest to highest, standard viola is C3, G3, D4 and A4.
What tuning does Mozart K.364 use for viola?
The viola is tuned one semitone above standard: C♯3, G♯3, D♯4 and A♯4.
Does tuner.love upload my microphone audio?
No. Pitch analysis runs locally in your browser. Microphone audio is not uploaded to a backend and is never replayed through your speakers.
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