Trompete vs. trombeta
While both words translate to "trumpet" in English, Portuguese makes a distinct separation based on the era and the mechanics of the instrument. Trompete usually refers to the modern musical instrument with valves, while trombeta refers to the ancient, valveless instrument used for signaling, historical contexts, or biblical references.
Trompete
A2Trompete is the standard term for the modern musical instrument equipped with piston valves, used in orchestras, jazz bands, and pop music.
O músico de jazz fez um solo incrível no trompete.
(The jazz musician played an incredible solo on the trumpet.)
Meu filho está aprendendo a tocar trompete na escola.
(My son is learning to play the trumpet at school.)
Ele precisa comprar óleo para as válvulas do trompete.
(He needs to buy oil for the trumpet valves.)
A orquestra sinfônica tem uma seção com quatro trompetes.
(The symphony orchestra has a section with four trumpets.)
Trombeta
B2Trombeta refers to a historical, straight, or curved instrument without valves, used for military signals or religious announcements. It is also used in botany for trumpet-shaped flowers.
Segundo a Bíblia, sete anjos tocarão a trombeta no apocalipse.
(According to the Bible, seven angels will play the trumpet in the apocalypse.)
O guarda soou a trombeta para avisar que o rei estava chegando.
(The guard sounded the trumpet to warn that the king was arriving.)
No jardim, a flor conhecida como trombeta de anjo floresceu.
(In the garden, the flower known as angel's trumpet bloomed.)
O som estridente da trombeta foi ouvido por todo o castelo.
(The strident sound of the trumpet was heard throughout the castle.)
Summary
Use trompete when strictly discussing the modern musical instrument with buttons (valves) found in bands. Use trombeta when referring to ancient instruments, biblical events (the Last Judgment), military calls, or trumpet-shaped objects like flowers.