When I first started making wine, I read a lot about it. Somewhere, in all that info, I read that there are two kinds of wine makers. Artists and Chemists. One is either interested mainly in the chemsitry of how to make a good wine, or the artistry of creating a good wine. From what I have learned, you can produce a more consistant product if you lean mostly toward the established chemistry of wine making, taking careful readings for PH, SO2 content, etc. This requires, needless to say, equipment with which to test your wine, with adjustments for (mainly) acidity and sulphite that follow, in order to make a well balanced wine that won't produce "off" flavors or smells, and will be well protected during aging. When I started out, I made kits and used established recipes, both of which---through the efforts of their creators---produced a balanced wine.
Having said all of that, many recipes call for an acid blend of some kind to be added in the primary with the fruit or juice to balance the must to a PH which will produce a wine somewhere between (PH) 3.1 and 3.7. If you were going to back sweeten the wine later, such as in the Dragon Blood or other Skeeter Pees, then a higher acidity may be desired in order to create a balanced wine at the end.
Having started out as a wine Artist---with no testing equipment---I have had a hard time convincing myself to move toward the Chemist. The Dragonette wine was an experiment. It turned out great in the end---with some slight modifications to the Dragon Blood recipe. I added 3 tsp of acid blend to the primary must to give the wine the desired balance. This amount was extrapolated from other recipes I had discovered using similar fruit.
Sorry, I'm rambling, my friend.
Did I, um, answer your question?
The complete Dragonette Recipe is here:
http://www.winemakingtalk.com/forum/f2/dragonette-triple-berry-wine-34681/