How do you get your iTunes to play 432hz files?

A 432 Hz file cannot be played by iTunes (or anything else). Do you mean KHz? Music for a CD is sampled at 44.1 KHz (over 44,000 Hz) and that sample rate is commonly used for audio files. Are you referring to the bit rate? This is often 128 or 192 kbit/s . Standard MP3 players are only required to play at bit rates up to 320 kbit/s and so a 432 kbit/s would be outside such a range.

@ who ever wrote the above. 432hz can be played by itunes and everything else. The question is referring to the frequency of the note A above middle C not sample rate. Lookup standard tuning for more information regarding the frequency of the actual notes being played. To tune your keyboard or anything else to 432 it requires you drop the frequency by 8Hz. This can be done with a guitar tuner or by ear using a frequency generator. Note: Regular guitar tuners all tune your A above middle C to 440. The Korg GA40 and CA40 allow you to adjust the frequency.