I have not quit, but have become much more picky about the music I listen to, especially music with lyrics. Previous to discovering A 432, I had almost completely stopped listening to any music, and would go months without hearing a single song. Now I can stand to listen to tracks in A 432, but A 440 cranks up anxiety. At first I didn't believe it, but it is as noticeable as the difference between the taste of distilled water and tap water. I've even done some successful "blind taste tests" with some of my friends. I've also read a study done with A 432, A 440, and EEG tests. It appears that A 432 brings the hemispheres of the brain into synchronization with each other.

I haven't yet found a simple batch method, but I have been using Audacity to convert music and even spoken podcasts into A 432. I would never go back. There are tutorials on youtube about how to do it. There may be better, but Audacity is free and works.