Online Trombone Tuner
Precise chromatic tuning for trombone, with concert Bb and A reference tones.
Tap the mic and play a note
How to tune a trombone online
Tap the microphone button and allow browser access — nothing is recorded or uploaded. Play a note in first position and hold it steady. CleanTune analyzes any pitch chromatically, so you can check your slide positions against the reference tones below.
Why some notes have more than one slide position
Because the trombone's harmonic series overlaps between positions, several notes can be played in more than one slide position — for example, B2 is available in both first and fourth position. Players often choose the alternate position to avoid awkward slide movement between notes, even though it changes the physical distance the slide travels. If a passage feels unnecessarily jumpy, check whether an alternate position smooths it out; the tuner will confirm both options read the same pitch.
Adjust your tuning slide
Extend the tuning slide near the bell to lower your pitch, push it in to raise it.
Watch your slide positions
Trombone intonation depends heavily on precise slide placement — use the tuner to check several positions, not just first position.
F-attachment players: check both
If your trombone has an F attachment, tune the open horn first, then check the F-attachment tuning slide separately.
Frequently asked questions
What note do you tune a trombone to?
Most concert bands tune to a concert Bb in first position.
How do I know which slide position is in tune?
Play the note, watch the tuner's needle, and nudge your slide slightly forward or back until it centers — small movements make a big pitch difference on trombone.
Can I use this tuner without playing into the microphone?
No — CleanTune listens to real sound through your device's microphone, so you need to play the trombone normally for it to detect pitch.
Why do some trombone notes have more than one slide position?
The instrument's harmonic series overlaps between adjacent positions, so certain notes are reachable in two spots — for example B2 in both first and fourth position. Players pick whichever keeps the slide motion smoothest for the passage.