Foobar2000
+
Soundtouch Plugin
(One can do a pitch adjustment using Soundtouch but that seems to simply raise the entire song up by a pitch rather than adjusting all notes based on a change in reference tuning. Question marks.)
From information I gleaned from various sources to get 444 Hz base or 432 Hz base...
Audacity can be utilized to do spectral analysis of MP3 files (i.e. Analyze > Plot Spectrum (Standard Autocorelation might be a particularly helpful Algorithm setting)).+ 0.16 semitones = 444 Hz (Pitch A) +4 Hz
+ 0.00 semitones = 440 Hz + 0 Hz
- 0.32 semitones = 432 Hz (Pitch A) -8 Hz
The idea seems to be that if you tune to 440 Hz you are "off" the natural/galactic/solar/earth vibe. But if you shift the 440 Hz referenced-tuned music up 4 or down 8 you get back into the natural vibe. The difference between 432 and 444 is 12 Hz which might have a major significance.
To shift an entire album +4 Hz or -8 Hz doesn't seem to be the point. Instead a semitone-based shift which shifts each note based on the relative difference along the scale appears to be the point....with the center of the shift being away from 440 Hz. Shift should result in:Semitones are logarithmic values:
0.5 Hz = -12 semitones
1 Hz = 0 semitones
2 Hz = 12 semitones
4 Hz = 24 semitones
8 Hz = 36 semitones
16 Hz = 48 semitones
32 Hz = 60 semitones
64 Hz = 72 semitones
128 Hz = 84 semitones
A4 => 444Hz or 432 Hz
A5 => 888 Hz or 864 Hz
A6 => 1776 Hz or 1,728 Hz.
Links:
http://www.phys.unsw.edu.au/jw/notes.html
http://www.phys.unsw.edu.au/music/note/
http://www.backto432hz.org/
(Seems using Audacity and coverting every note based on a change to the base of tuning reference would be required to make a song "432" or "444".)