Is it possible to change the standard tuning from A 440hz to A 432hz or some other?
no, that is not supported, maybe something for the future.
It’s the future now, will it work yet? 
I was also interested in this.
It works here, internally on development versions 
Any news?
Started recording at 432… I must have MG.
Can’t you do that in vsts? I know omnisphere has a global tuning
Alternatively, many free tuning plugins offer reference frequency calibration.
i have at least a half dozen synth vst’s which allow tuning to 432.
perhaps dragonhill wants to record guitar audio alongside the synth output.
if not, tuning to 440 and playing thru a 432 synth will provide the desired result.
if the guitar audio is desired, it could be detuned later to match the synth. but as hearing them simultaneously probably won’t be fun i’d monitor the synth only.
Yeah I realized most synths can tune to 432 after posting. Just can’t use the poly tuner in MG.