purchasing software dectalk

[MICHAEL WEAVER <michaelweaver1 btinternet com>]

I was trying to get a decent software synthesiser for when I eventually  
get Orca
running.
I heard the demo of Orca being used with a nice sounding synthesiser,  
possibly the
dectalk only when I use my Windows Screenreader to download  this 
synthesiser or
purchase it, the onclick seems not to do anything on  the website for this.
The default synthesiser I heard when trying to run Gnopernicus wasn't  
the best sounding
of things, the speech was understandable just about  but I use a laptop 
at my Linux
grou[p and it tends to get nosy in Vox  Bar or all the upstairs noise 
comes down
to those of us discussing Linux.
How can I either get this synthesiser or if not could someone suggest  
one that might
work just as well as the Dectalk?
On the website it talked about it being a good synthesiser in a noisy  
background
which you can say Vox Bar is as it is a student place I think.
Hope someone can help.