I'm very skeptical of the whole "magical" properties of 432 aswell. The main thing that got me intrigued was the many comments mentioning that 432hz sounded fuller and projected more outward.

Now I'm not sure if it's because I had preconceptions about how it might sound fuller, that my mind is plating tricks on me. But I tried this on my acoustic and 2 electrics and all sounded "bigger". I also played a few chords for a non musican friend in 440 ,then quickly retuned to 432 without telling them what to expect and played the same chords again. Their first comment was that it was louder and closer. I was playing an acoustic about 4m away from them. Then I told them what I was testing and asked if the sound filled the room more and they said that's exactly what they felt.