Music tracks can be the equivalent of noise, or they can be something more, if an engineer has competently mixed or arranged the sound elements. While even the best mastering software is just a tool, and cannot replace the skill of a professional, much can be said for using a good mastering app to edit the tracks. This can vary from a base program to a number of plug-ins. Red mastering uses the best paid tools in each such category, rest assured. But for those who have acquired some skills, but may be lacking in the budget department, the below examples of free and affordable tools can get the job done.