In general, MuseSounds suffers from a dynamic balancing issue where 'forte' is too loud and 'piano' is too soft. It is at its worst with the brass. Solo trombone with a 'piano' marking will sometimes make no sound at all (the mixer literally shows no gain), and the same passage with a 'forte' marking is almost unbearable. Tuba is mixed for orchestra and therefore drowns out other brass soloists at most dynamic points. Horn seems to be the least affected, which is ironic since the MS Basic horns are noticeably quieter than its counterparts.
the trumpets are way too quiet, and the trombones are a little too rough at forte. Also no euphonium sound.
this sound Library is great, especially the french horns, however, the trumpets are poorly mixed, which makes them very discret, and the mute trumpets are even worse, you can't even hear them without the mastering plugin, but the rest of the brasses are really well made.