Mystery
I made demonstration how you can use ReClock to get 432 Hz audio from 440 Hz in realtime.
https://youtu.be/zD2gwTC__jE
Several rules.
1. You need to add custom resolution to your display. Different for each source framerate. In video shown example with 25 fps source.
2. You need to check if your audio really 440 Hz base frequiency. It is needed to use some frequency analyzer.
3. Slowdown can be applicable mainly for instrumental music but not for voice or sounds of nature. It this case sounds are real when pitch is 1.00x at source speed.
Calculations and explanations.
25 fps soucre. Integer mutipliers 2 and 3 gives numbers 50 and 75.
I take 75 Hz and slow down it with 432/440 ratio. I got 75*432/440 = 73,636 Hz.
I used NVIDIA control panel to add this custom resolution (and frequency) to one of my monitors.
I allow ReClock to use 3% slowdown. So I got new sample rate in ReClock for 44100 Hz audio: 43296 Hz.
Make some test with calculation real ratio: 43296 / 44100 = 0,981769 It is very close to yours 0,981818.