Personally speaking I find the computer doing things on it's own a bit annoying... It's easy enough to start the audio when I am ready to hear it.
בס''ד
You can pause or stop the program altogether at any time. You can also go forward or backward to any point in the program. You can adjust the sound level and there is a timer to show you at what point you are in the program. In other words, this gives JTFers far more options and more importantly, the program doesn't freeze after a few minutes because of Apple's bugs.