Focus Fidelity Filter Designer

[Confused]

it seems there is no test version available which is a no-go for me...

Which is a fair point I think.

Prior to purchasing the software I was worried about functionality, and indeed if the results were would be any good.  I had some confidence regarding the results, but this was only based on the Mitcho article linked in the OP.

In my case, prior to buying the software, I sent a copy of my REW measurements to Focus Fidelity, asking if they were ok and actually worked in the software. I exchanged a couple of emails with Focus Fidelity (they were very responsive considering the +11 hours time difference), they confirmed all was good and that my measurements loaded an ran in the software.

This was enough for me to take a punt and buy, but obviously it did not give me the chance to try the software for myself.

This perhaps begs a question.  What would you want from a demo version?  I am thinking they could provide the software with everything except the functionality to actually produce the convolutions.  This would let you try the software, but not hear the results.

If they included the functionality to produce the convolutions, you could make them, fine tune them, run them in your system for many years without actually buying the product.  Which would be great for a demo, but not very good business for Focus Fidelity.

I am thinking aloud a little here, but would you be happy with a demo version to try, if it did not actually let you generate and listen to the resulting convolutions?  

Not ideal, but better than nothing I guess?