Trumpets don’t need it much until you get into the top end of the range, where certain notes are out of pitch. 5th partial is particularly flat, and 7th is sharp. Using 3rd valve as a replacement for 1+2 is flat, so you use the slide to correct.
Doesn’t really matter until you get to a pretty high level, are playing in a large brass band or know your instrument well enough to know which notes tend to be a few hz off.
Weather can also be an exaggerating factor, so playing indoors won’t have the same need
Yeah the third valve slide.
To this day I never understood it’s purpose as I’d lost the key ring to it and never used it.
My teacher said it was for getting the right tune when using the third valve yet my trumpet was always in tune even without using it.
It’s for tuning
Trumpets don’t need it much until you get into the top end of the range, where certain notes are out of pitch. 5th partial is particularly flat, and 7th is sharp. Using 3rd valve as a replacement for 1+2 is flat, so you use the slide to correct.
Doesn’t really matter until you get to a pretty high level, are playing in a large brass band or know your instrument well enough to know which notes tend to be a few hz off.
Weather can also be an exaggerating factor, so playing indoors won’t have the same need