Attached are a simple pdf and mp3 of a grand staff piano score. (This sounds virtually identical on wav, but wav exceeds the upload size here.)
The first three measures are mf, and sound fine. The second three measures are mp, and sound like they are underwater. Not just softer, but notably mushier. Measures 7-8 are mp, and the A and B sound plingy, like hammers striking strings with worn out felt pads. Measures 9-10 are mf, and sound fine.
This is concerning, as a shift from mf to mp is like a move to a much different and worse instrument. Not what you would expect of a $100k grand piano sampled in a studio.
Notion 6, Mac Sierra, 4 year old Mac Book Pro.