Is the app necessary? When I first opened the app it had a bar to control the level of noise canceling, then with an update it was gone. Now there's just a control bar for volume, you are now forced to create a "mode" in order to directly control your noise cancelling.At first I would only switch from complete noise cancelling to fully aware, but now that I'm using the headphones more and more I realize I need another mode BUT the app only allows for 4 modes and 2 are already premade. Update pls