Been away from this forum for a while. Sold a screenplay. Lots of other stuff going on. I am pretty much finished orchestrating my score. I am spending what little free time I have polishing a demo (or what will suffice for a demo until I can afford to hire singers).
I have a question about the changes to timber and other characteristics that some instruments exhibit when the volume changes. For example, on my French Horn sample library, when the value of cc7 gets to about 100 or more, it sounds very brassy and buzzy (which is very nice for some passages in my piece, though less desirable and less what I think of as horn-like in most others). I have noticed with this library and some others that there are crossfaded instruments where the transition between such changes can be made more subtle. I would just like to know if this is how a real instrument behaves. To use the example of the French Horn again, if the part is getting progressively louder, would the brassier sound I described gradually increase, or does it suddenly kick in at a certain decibel level?
Perhaps a simpler way to ask this question is: Should I be using crossfaded instruments if they are available in the library I have?