Hello David,
Thanks for the interest in Hauptwerk.
The Sonus Paradisi St. Maximin sample is very large, and you'd need a much more powerful computer than the P4 you mention to be able to use it effectively.
This Hauptwerk prerequisites PDF near the top of this page covers general requirements and recommendations for running Hauptwerk:
http://www.hauptwerk.com/support/requirements/... and also have a look at the 'technical info' PDF for more detailed recommendations for computer hardware.
The Sonus Paradisi website has specific recommendations/prerequisites for the St. Maximin sample set here:
http://www.sonusparadisi.cz/organs/Maximin/screenshots.0.aspIn general, I think a fair summary would be that to be able to use the sample set effectively in full you'd want want a computer that meets at least the following minimum spec.:
- Quad-core processor
- 6 or 8 GB of memory
- 64-bit operating system (either 64-bit Windows 7 if a PC, or OS X Snow Leopard if a Mac).
- A reliable semi-pro/pro audio and MIDI interface, e.g. any of those we list in the Hauptwerk prerequisites PDF.
- The Advanced Edition of Hauptwerk.
Best regards, Martin.
Hauptwerk software designer/developer, Milan Digital Audio.