This online tuner allows you to tune your trombone.
Instructions:
- Click 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 other).
Advantages of an online tuner?
- Requires no installation of an application or software.
- Works on all devices: computers, mobiles, tablets, etc.
- Reliability.
Tuning your Trombone
To tune your trombone using this online tuner, here's what to do:
- With this tuner, click start.
- Click on "allow dacapoalcoda.com to use your microphone".
- Choose the reference A (440Hz, or generally 442Hz).
- Play the note you're tuning to, a B♭ in the first position.
- Check the accuracy of the tuning:

The cursor is in the middle: you're perfectly in tune!

The cursor is to the left: you're too low, you need to push the tuning slide.

The cursor is to the right: you're too high, you need to pull the tuning slide.
Before orchestra rehearsals, all brass instruments in the family of wind instruments tune to a real A or a real B♭, depending on the type of ensemble:
- In a symphony orchestra: on a real A.
- In a wind ensemble (concert band): generally, the oboe gives the A for the woodwinds and then gives a B♭ for the brass, so trombonists tune to a B♭.

Tune your trombone to a B♭ by pulling or pushing the tuning slide.