What’s your favorite brass instrument?
Wiki said:
Saxophones are usually made of brass
LOL
A brass instrument is different than an instrument made out of brass.
https://en.wikipedia.org/wiki/Brass_instrument
“Wiki” said:
The view of most scholars (see organology) is that the term “brass instrument” should be defined by the way the sound is made, as above, and not by whether the instrument is actually made of brass. Thus one finds brass instruments made of wood, like the alphorn, the cornett, the serpent and the didgeridoo, while some woodwind instruments are made of brass, like the saxophone.