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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Live target±5 cents
C3·G3·D4·A4
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Know the target
Standard viola tuning
Standard viola tuning uses C3, G3, D4 and A4 in fifths, one fifth below the violin. Each target follows its own measured string route and wooden peg on the rendered pegbox.
Mozart's Sinfonia Concertante K.364 uses C♯3 G♯3 D♯4 A♯4 scordatura, raising all four sounding strings by one semitone and increasing tension.
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.
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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Open viola tuner for standard cgda and mozart k.364