Which musical instruments require the most air?
(On a tuba, the note you’re playing makes a big difference; if you’re up in the bass clef proper, you’re not actually pushing all that much air and will probably need to breathe for oxygen before you need to breathe for wind, but lower notes … particularly the “pedal tones,” the ones two octaves below the staff that look like piccolo music turned upside down … are a different matter.