I would love to help, are you trying to change a full song? or are you wanting help tuning your instruments global tuning to 432 or 528 so you can make music in peace from now on?

i have not found a good way of changing the tuning down 8hrz yet but if high quality is not what your after download audacity

http://www.youtube.com/watch?v=W-kWiyNV_G0

but you can easily change your global tuning of your instruments down to 432hrz you can download digital tuners for guitars ect and change the tuning down in the settings its very easy a quick

http://www.youtube.com/watch?v=OI76csrFHi8

Cool, I am interested in checking it out, the link is not direct, could you re direct me?