The graphics of the stadia are very good. There are various levels of detail that can be selected for people with slower machines. I ran the game with everything at the highest level and there was only a slight slowdown in the graphics. It is fairly accurate in its display of the stadia. The sound isn't that bad.
Umpires call balls, strikes, and outs.
The type of foul ball call depends on how close the ball was to being fair. There is also some ambient crowd noise and voices from the stands from vendors and hecklers. The disappointing thing is that there isn't much crowd reaction to what happens on the field. If someone hits a home run, the crowd acts like nothing happened. One of the best parts of this game is the instant replay option.