Audio Manager subdivided into more levels than what Android provides

Android provides a default of 15 steps for its sound systems which you can access through Audio Manager. However, I would like to have finer control.

One method of doing so seems to be altering specific files within the Android system to divide the sound levels even further then default. I would like to programmatically achieve the same effect using Java.

Fine volume control is an example of the app being able to divide the sound levels into one hundred distinct intervals. How do I achieve this?