Free · in your phone's browser · nothing uploaded
Trumpet tuner
A free trumpet tuner in your phone's browser: play written C, G and C, and it says how far off you are, transposed for B♭ trumpet (or C trumpet). Nothing uploaded.
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The microphone stays open while you tune and closes when you stop, when everything is in tune, or after half a minute of quiet. Nothing is recorded or sent.
How to tune
A B♭ trumpet sounds a whole tone below what it reads: your written C is a concert B♭. The tuner names the notes as you read them and does the transposing. Warm up for a minute first, then play each note long and steady, without pushing it with your lips.
If the notes come out sharp, pull the main tuning slide out a little; flat, push it in. Check a few notes, not only one: a trumpet is never perfectly in tune with itself, and the middle G is the one to trust most.
The needle shows how far you are from the note the tuner expects, in cents: a hundred cents is a semitone, five or closer gets the tick, and anything inside twenty most people don't hear.
Then play something
The notes you tuned go into Brumm as a short melody, inside a club track with a beat and a bass. No account, no upload: the notes travel inside the link itself. Hum or play a line there, and it becomes an instrument.
The microphone is read in the browser and nothing is kept. How the site counts visits.