Greetings, augusto. Though a good personal understanding of the available casing options and their usefulness in adjusting the characteristics of tobacco is quite useful (and with regard to pH adjustment, I believe essential- my own investigations/experimentation are ongoing in this area), rather than looking for chemical "tricks", you'd likely be much better served by examining the quality of the leaf you're smoking, and making a change to product which does not taste intrinsically "flat" to you. If you can find some quality leaf and adjust the pH properly, typically by application of mild food-grade acidic solution, you'll likely get smoke which tastes (actually mostly smells) good and is in no way flat or lacking aroma. Good wine can not be made out of mediocre grapes, but only with good grapes- no matter the skill or experience of the vintner. True, somewhat decent wine can sometimes be made from inferior grapes by various manipulative treatments, but the results will always be much less enjoyable compared to a product that begins with quality raw materials. I think that's probably the real source of your dissatisfaction. You can roll 'em fatter too, of course. I thought your thread was going to be about someone looking for fire-cured tobacco.