I’m beginning to think that Dorico does some things to the notes that OT doesn’t like: all the Playback Options stuff about note lengths, variation of timing and dynamic, etc etc.
I get markedly different results using Logic.
Here’s my observations in creating maps for OT’s Miroire library.
The one thing I got wrong was the Dynamic Range slider shouldn’t be moved to the right: keep it at the left. I vacillate between deciding whether their Legato mode is a good thing or not on a daily basis.
But still my main gripe with OT is that their samples seem very ‘late’ compared to others. Like a real orchestra, I’d forgive a lot if they just played on the beat.