Or something similar built into Reaper itself. If it makes sense for software programming, the same for music production
.
http://svnbook.red-bean.com/en/1.4/s...ro.whatis.html
http://tortoisesvn.tigris.org/ <--- Tortoise GUI for Subversion.
Of course to track small changes, things like single tracks, items, FX rack states or automation would be saved into separate files (more on that in earlier posts).