der Sopran
soprano
The highest human vocal range, typically sung by women or boys. Also a person who sings in this vocal range.
Die Sängerin hat einen klaren, kräftigen Sopran.
The singer has a clear, powerful soprano.

soprano
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soprano
The highest human vocal range, typically sung by women or boys. Also a person who sings in this vocal range.
Die Sängerin hat einen klaren, kräftigen Sopran.
The singer has a clear, powerful soprano.

You can recognize the meaning from the verb and the preposition. When someone 'im Sopran singt' (sings in the soprano section), the musical voice or part is meant. When someone 'ein Sopran ist' (is a soprano) or 'einen Sopran hat' (has a soprano), the person or the vocal range is meant.
Im Weihnachtskonzert singt sie im Sopran.
In the Christmas concert, she sings in the soprano section.
The word 'Sopran' (soprano) can refer both to the person with this voice and to the vocal range itself. The context makes clear what is meant.
Der Sopran des Chores ist heute leider krank.
The choir's soprano is unfortunately ill today.
To describe the quality of the voice, 'Sopran' (soprano) is often combined with adjectives such as 'klar' (clear), 'hoch' (high), 'hell' (bright), 'lyrisch' (lyric), or 'dramatisch' (dramatic).
Die Opernsängerin ist für ihren dramatischen Sopran berühmt.
The opera singer is famous for her dramatic soprano.
When referring to the musical part in a choir or ensemble, the fixed expression 'im Sopran singen' (to sing in the soprano section) is used.
Obwohl ich eine tiefe Sprechstimme habe, singe ich im Chor im Sopran.
Although I have a low speaking voice, I sing in the soprano section in the choir.
bass
'der Bass' and 'der Sopran' both belong to music and describe vocal ranges. But they are at opposite ends: 'der Bass' is the lowest male vocal range, while 'der Sopran' is the highest human vocal range. The words can be confused because both appear in choir, opera, and music lessons. As a simple guide: bass sounds low, soprano sounds high.

In der Aula übernimmt Lena heute den Sopran.
Lena is taking the soprano part in the auditorium today.
Im Chor singt Herr Kaya den Bass, weil seine Stimme sehr tief ist.
In the choir, Mr. Kaya sings bass because his voice is very low.