Converting from Keynote to Powerpoint without losing audio recording

I know this question as been asked on how to convert a keynote presentation to a powerpoint format presentation, and I can do that with keynote itself, I've also tried the zamar and icloud drive options but they don't work the way I want them to work. I'm recording audio over my keynote presentation and when I convert over to powerpoint it removes the audio recording. The same thing happens with I attempt the icloud option. Can someone tell me how to convert between the two without losing my audio recording.