It goes without saying a lot about composing music, and music producers can also use other people's good songs to make music.
Arranging music, to put it bluntly, means doing accompaniment. Nowadays, electronic music is very developed. A person with a set of equipment and a set of professional software is equivalent to having a big band.
Recording: It is not simply to press the recording button, which requires the sound engineer to have a superhuman hearing ability. Any musical instrument or any inappropriate sound of any person must be disposed of.
Post-production means finishing. When we listen to records, we sometimes find that the singer's voice seems to be very special. This is the post-production, and sometimes the recording is going on at the same time. In the post-production, we will not only make the singer's voice, but also make the voice of other instruments or sound effects.
from the above, music producers are all-rounders. Which direction am I going!