A person who plays the euphonium is sometimes called a euphoniumist, euphophonist, or a euphonist, while British players often colloquially refer to themselves as euphists.
Baritone or tenor tuba.
A Musician
A 'Recorder Player' Some call it a 'Recordist' but that primarily pertains to the art of making sound recordings. The Recorder instrument is a type of flute, so the player could also be called a 'Flautist'.
Percussionist ^ ^
changing their embochure and tuning your insrtument
Its got to be the compass!
Call and response is where either an instrument plays a melody and the singer echoes it or vice versa.
This instrument is a balance.
A 'Recorder Player' Some call it a 'Recordist' but that primarily pertains to the art of making sound recordings. The Recorder instrument is a type of flute, so the player could also be called a 'Flautist'.
A trombone.
forceps
The instrument is call an attitude indicator or artificial horizon.
richter
an instrument
The Pilgrims called Squanto a "friendly Indian" or "interpreter" as he helped them communicate with the local Wampanoag tribe and taught them survival skills such as farming and fishing.
A thermometer
Percussionist ^ ^
"The instrument of our independence"
a camera