This online tuner allows you to tune your cello.
Instructions:
- Click on start.
- Click on "allow dacapoalcoda.com to use your microphone" (from your webcam, for example).
- At any time, you can select the A reference note (440Hz, 441Hz, 442Hz, or another).
Advantages of an online tuner?
- Requires no installation of an application or software.
- Works on all devices: computers, mobiles, tablets, etc.
- Reliability.
Tuning Your Cello
To tune your cello with this online tuner, here's how:
- Using this tuner, click start.
- Click "allow dacapoalcoda.com to use your microphone."
- Choose the reference A (440Hz, or generally 442Hz).
- Play the string you want to tune with the bow.
- Check the accuracy of the tuning:

The slider is in the middle: you are perfectly in tune!

The slider is to the left: you are too low; you need to tighten the string by turning the pegs or using the fine tuners on the tailpiece.

The slider is to the right: you are too high; you need to loosen the string by releasing the pegs or using the fine tuners on the tailpiece.
You'll need to tune the four strings, C, G, D, and A:
Before rehearsals, all the string instruments in the orchestra tune to an A, as they all have an open string producing an A. It's best to start with the cello's A string, even if you're playing alone:

Tune the A string (A3), by tightening or loosening the pegs or using the fine tuners on the tailpiece. The A string should turn purple (on the tuner, not on the cello, otherwise it's on fire [O:])!

Tune the D string (D3), by tightening or loosening the pegs or using the fine tuners on the tailpiece. The D string should turn purple.

Tune the G string (G2), by tightening or loosening the pegs or using the fine tuners on the tailpiece. The G string should turn purple.

Tune the C string (C2), by tightening or loosening the pegs or using the fine tuners on the tailpiece. The C string should turn purple.
After tuning each string individually, briefly recheck the tuning of all four cello strings.
Some Tips
- New strings quickly detune; after changing a string, it needs more frequent tuning.
- If the strings won't hold the tuning, perhaps the pegs are poorly adjusted.
- Avoid overtightening during tuning, as beyond a tone and a half higher, the risk of breaking the string is high.