expressions adjustments?

Hi,

Is there anyway to adjust, say, the vibrato of an instrument, or any other dynamics or expressions of the instrument aside from the way it was recorded?

Music Studio doesn’t have vibrato, expression or other modulation functions. However, it’s possible to manually achieve similar effects by recording changes in the filter effect or pitch-bend. Here’s a video that demonstrates filter recording:
https://www.youtube.com/watch?v=7QH-jihIWJA