Musecore 4 is just...incredible.

I can't believe this is free. After downloading the MS4 app and the new free sound packs I wasn't sure what to expect. I took one of my brass choir arrangements (Sultana Dreaming from FFXIV) and loaded it up. The only missing instrument was Euphonium; I initially tried the Cimbasso, but ultimately went with the Bass Trombone sound for this one.

The result is astonishing. I had to do some very small dynamics tweaking, and I still have some polishing to do, but in just about an hour I managed to get this level of quality basically out of the box: https://soundcloud.com/teerizzmusic/sultana-dreaming-ms4-brass-choir (sheet music here, if interested - https://musescore.com/user/31834950/scores/6840286)

Major thanks to the Musescore team and the talented musicians, producers, and engineers who made this new version possible!