I'm using Overture SE with GPO Studio and one strange thing happens (particularly with an orchestral template)
I use a remote keyboard controller tunneling Overture through the "midi thru" function. So clicking with the cursor on different staves I can hear the different sounds.
This work quite well with most of the staves and doesn't work with some others (particularly it doesn't work with "transposed staves" like French Horns, English Horns, Clarinet, Trumpet, Viola - and it works well with "non transposed staves" like violin I and II and with bass clef instruments like cello, bassoon and so on).

What I'm doing wrong ?