Ardour (https://ardour.org/) and LMMS (https://lmms.io/) are probably the two most popular open-source DAWs. I also really like MuseScore (https://musescore.org/) for composition.
I have a score for a choir in musescore and want to create practicing files. For example in the soprano file the soprano voice should be louder than the others. Do you know of an automated way to achieve this? Maybe via midi then ardour? I looked at some other tools like timidity but none seem to have the required api.
Thanks :-)
Ardour is also available as binary packages on every Linux distribution.