Read the written note and sounding note together
A B-flat trumpet’s written C sounds as concert B-flat. The large result uses the player’s written note, while the second line keeps the microphone’s concert pitch visible so accompaniment and tuner notation cannot be confused.
Tune with air before moving hardware
Hold a centered middle-register tone at a comfortable dynamic. Repeat it with the same breath support before moving the main slide; a collapsing airstream can look flat even when the instrument length has not changed.
Use the trace as a stability check, not a lip target
Approach the note naturally and observe the sustained center. Forcing every attack onto the needle can distort embouchure; compare several comfortable notes because brass intonation varies by fingering and register.
Questions
These answers cover B-flat transposition and unstable attacks.
Why does written C show sounding B-flat?
The page separates B-flat trumpet notation from the concert pitch heard by the microphone.
Should I tune from the first instant?
No. Let the articulation pass, then read the sustained center of the tone.
Is audio sent away for analysis?
No. The existing pitch engine runs in this tab.
Sources used for transposition
The written-versus-sounding relationship follows the B-flat transposing-instrument convention documented in instrument manuals; frequency and cents are measured locally.
Live microphone or selected-file audio is processed locally in this browser and is not uploaded.