Focus Fidelity Filter Designer

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Late to this party, I know, but I've also taken the plunge and bought a licence for FFFD.  After just a couple of hours initial experimentation, I must say I'm very pleased with the results so far.  The process of using Impala to make the measurements and then the Filter Designer itself worked very smoothly.  I'm actually looking forward to doing it all again more carefully and fine-tuning the results.

The most obvious improvements I'm hearing so far (in my un-treated but otherwise not too badly-behaved room) are in these areas:

* better-balanced and controlled bass - double bass and bass guitar now "play tunes" more naturally
* improved mid- and high-range clarity - details are better resolved and sound more natural
* stereo imaging - deeper and more stable

Why did it take me so long?  Well, mainly because I've been holding out for a version I could run on my Mac.  The Mac version was released recently, but unfortunately it won't run on my Mac which is still on macOS Monterey rather than Ventura, the minimum requirement.  In the end, I thought I'd just bite the bullet as I also have occasional access to a PC.  If Impala and Filter Designer were made available on Monterey, that would be great, but otherwise my Mac is probably overdue an OS upgrade anyway so in due course I'll no doubt end up transferring the licence to my Mac.

Thanks @Focus Fidelity for a nicely thought-through program at a good price.