Atari-Midi Archives

Hi All

I have aquired a Falcon, TT030, and Mega ST2 from eBay.  I have also
aquired Sonus Masterpeice, Steinberg Cubase Audio, Steinberg Avalon,
and the Steinberg 16 bit D/A unit, all with their hardware
dongles/keys.  (I also have the Sonus sample editor for the Akai
S900/X7000 which I have from long ago with my 520 ST.)  Is there
anyplace that I can get the final/latest versions of these programs? 
I am not sure which versions I have yet, but I would like to be sure
that I have the final versions that were released.

Thanks for the assist!

Larry