Windows OneCore voices and rate of speech

Felix G.

Hello list!
Seems I'm doing something very wrong and need someone to enlighten me. ;-)
I'm trying to use the OneCore voices with NVDA. It works to some degree but even if I set the rate to 100 it doesn't get anywhere close to the speed I can set with Narrator. So I switched back to Espeak which, at 40 and speed boost, is about right for me.
So my question is, what do I need to set in order for NVDA to really make use of the power of those Windows voices?
Best regards,

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