HOW TO: CHANGING THE CONCERT PITCH + TEMPERAMENT (POST PROD.)
USING SOFTWARE TO CORRECT TEMPERAMENT
Antares Auto-tune / Melodyne Editor / Waves Tune
When you have the separate instrument tracks of a song, then you do have the option to re-tune and RE-TEMPER the instrument tracks individually changing not only the concert pitch but the temperament as well.
This is possible due to software like the Melodyne Editor.
The videos below provides information on how to use different Temperaments and Concert Pitches. These videos aren't turorials about 432-tuning in particular, but 432Hz as Concert Pitch is being mentioned in the second video (03:46 - 04:00).
Other plugins that can be used to change the temperament, are Waves Tune and Antares Auto-tune. With both plugins you can select the scale, in the case of 432-Tuning we set it to Pythagorean. Now, it is important to know how to work with these plugins, so if you have never worked with them before, then I suggest you check some youtube videos and read the manuals.
Important is that you have to make sure that you do select the correct root (Waves Tune) / key (Antares Auto-Tune) and use formant correction. Also pay attention to the range (Waves (Tune) / Input Type (Antares Auto-Tune) settings of these plugins.
RECORDING IN PITCH & TEMPERAMENT IS ALWAYS BETTER!
Every form of "manipulation" will cause loss of quality to a recorded sound. The better the algorithm used with the software, the smaller the loss. Nonetheless, it is always preferable to tune the instruments you like to record to the right pitch and temperament, if possible.