Tune your trumpet
Sound the note, play your open C, and move the tuning slide until the two stop beating against each other.
A = 440 Hz
If you hear nothing on an iPhone, check the silent switch on the side.
Sound the note, play your open C, and move the tuning slide until the two stop beating against each other.
A = 440 Hz
If you hear nothing on an iPhone, check the silent switch on the side.