Theorie:

To speak about music, you need the appropriate vocabulary.
 
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Accordion – Akkordeon, Ziehharmonika

Bagpipe – Dudelsack

Bassoon – Fagott

Brass instruments – Blechblasinstrumente

Chamber music – Kammermusik

Classical music – klassische Musik

Compose – komponieren

Composer – Komponist(in)

Conductor – Dirigent(in)
 
Quellen:
http://study-english.info/
https://www.theodysseyonline.com/open-thank-letter-music