Alarm Voices

When using the voice notification module, I sometimes get questions from my operators about clarity of the alarms. I know I can change the scripts, and that helps some, but the voice seems to be part of the problem.

Is there any plan to add new English voices?

Is there some way I can change how the voice sounds, perhaps slow down the voice?

(I am using the new voices.)

There is a voice rate setting in the Notification profile settings.