Here are couple tutorials that I created that show how to convert your music from the 440 Hz tuning to 432 Hz tuning.
This tutorial shows both a low quality and high quality conversion method in Audacity.
The tutorial below shows shows how to convert in Audacity and also in Adobe Audition. I personally use Adobe Audition for conversions and this is the best program that I've been able to find that does the best quality conversions. It is not free; however, I'd recommend it to anyone that is more serious about this and of course to those that have the budget for it. The cost of this program is about $180.
