Brass instruments have no usable fundamental and start from their second mode

Evidence

The second mode is therefore the lowest musically usable mode avail­ able in a brass instrument (note that the lowest mode does not correspond with 1F). Overblowing from the second mode to the third mode results in a pitch jump of a perfect fifth, or seven semitones. The addition of three valves to brass instruments (except the trombone), each of which adds a different length of tubing when it is depressed, enables six semitones to be played, sufficient to progress from the first to the second mode. — David Howard, Jamie Angus, coustics and Psychoacoustics, 1276

Categorization

• SHARE: A brass-player friend would enjoy the detail that the fundamental mode of a trumpet is musically unusable and the real lowest playable note is the second mode.
• XREF: connects to: The second brass resonance mode is the lowest usable musical pitch — David Howard, Jamie Angus, coustics and Psychoacoustics, 1276