HiroboFreak wrote:seems comparable to other voices
I have not extensively used the TTS Pro (assuming you got them from one of my downloads) AU voices, but I have with both the UK and US English versions, I get all appropriate voice alerts/exits, and I can tell you that the dictionary.voice files in each/any of the English voice files are identical, so the problem is not there. If there are any differences in any of the config/*lua* files for the AU voices, I could not say, but try one of the UK TTS Pro voices and see if it solves your problem. If so, the config/*.* files from the working UK voice(s) can be relatively easily transplanted into the AU voice file(s). The reason you should use a UK voice file for this instead of the US voices, is the difference in commands for metric units...US voices do not contain any metric-specific references.
[color="#FF0000"]Oh and PS:[/color]
If you got the voice files/engine from somewhere other than one of my downloads, there could be differences/errors in countless places, and I may not be able to help with that as I have no copies of voices from other places.