I am not happy with the volume output from the headphone out. I have tried a couple of volume booster apps. They work OK, but they only take the volume to the app's maximum. There is no adjustments. If I lower the volume with the phone's buttons, they jump the volume back up to max. It would be nice to be able to adjust the volume to points between the phone's max to the app's max. Does anyone have any recommendations. I am currently using an app that is just called "volume control". I can't remember the first one I tried, but the icon is a big boom box. It does the same thing.