How to make XL.Speech.Speak talk in a male voice

Hi there. I recently learned how to make excel/powerpoint talk, but I've only been able to make it do so in a female voice. Is there a way to do it in a male voice? In PowerPoint, before using the code, I had to go visual basic, tools, references, and make sure Microsoft Excel 12.0 (or whatever version you're using) object library was checked. Here's the code:

Sub Icantalk ()

Dim XL As Excel.Application
Set XL = CreateObject("Excel.Application")

XL.Speech.Speak "Random talking stuff"

XL.Quit
Set XL = Nothing

End Sub

So right now, it would say "Random talking stuff" in a female voice when I activate the macro. Any help would be greatly appreciated!