? Ringer volume and System volume?

[df79transam]

I see that unlike my regular razr maxx, the maxx hd has it where when you turn the ringer volume down the system volume goes down also, I hate this, is there an app that will let you adjust the two separately. I use Google now and when the voice comes up, she is so loud, and if I turn it down, then I'm afraid I'll forget to turn the volume back up and then won't hear the phone ring.