TimV is correct. 432 Hz is A (440Hz) but with minus 32 cents applied in the tuning. It certainly is not 8 semitones below A 440. The Ab below A440 is already at 415Hz so it is only A 440 tuned slightly flat.
You may not get the effect either by just slowing a session down slightly. You may have to retune your synths first and record any new material such as bass, guitars, vocals, acoustic instruments etc all tuned to the new tuning and maybe then see how it sounds.
If you read this you will also see many tuning references mentioned:
http://en.wikipedia.org/w...0_%28pitch_standard%29 I am not sure if altering tuning like this is going to be significant. I have experimented with several instruments within one piece being tuned to different references though and things can get interesting in that situation. It can effect things like ambient pieces that contain non tuned sounds too.
What I found was much more interesting was how Just Intonation sounds compared to Equal Temperament. Now that is a different thing. Check out this little video here on that very thing. It is pretty convincing as to why it sounds better.
http://www.youtube.com/watch?v=BhZpvGSPx6w Most things are equal tempered making them a bit if a compromise. Some synths can go into Just Intonation tuning or alternate tuning. Very nice. This thread has alerted me to something about my Kurzweil PC3K hardware synth. I have just found out it has 17 Intonation tuning maps. OMG! This is way more interesting than just tuning the whole instrument down to 432Hz.