I finally got the time to dive a bit into this host (demo version) - and for me, it is not(!) an "instant-buy".
Let me explain:
It is definitely stabbing at the (now sadly very, very) old C.Budde VST Plugin Analyzer. But this is where it ends. It's a somewhat dumbed down version (certain features not hidden behind hotkeys), although definitely better documented (old VSTPluginAnalyzer didn't have a manual). A lot of "experts" are definitely going to be inbound.
There are a lot of things that highly annoy me with the demo alone. Mainly the fact that it doesn't save settings every time the host is closed. Or the 20s "Demo taking a break" thing like every half minute or so. But that's just a sidenote.
What I don't like, are the following things
1) Frequencies can't be set manually:
You only have a dropdown menu. And on first load of the plugin, I could only scroll down to 530Hz - I didn't have access to higher frequencies, only after I clicked wildly through the settings. Also - 1kHz is not 1kHz, but depending on the sampling rate used for measurements, 1022,83Hz or 1054,69Hz. Well, good if you want to find out aliasing. Though a considered "standard" is 1kHz for THD+N tests. And speaking of which:
2) THD+N Harm Signal amp plot readout is not equal to the value:
At 0dB it's actually -6dB on the graph. If I pull the signal down to -18dBFS, I get a readout of -24dBFS peak. Can't be normal, right? Unless something was smoothed.
3) Zooming is not good:
Here I really prefer something similar as to what Christian once did. You could drag directly on the scale and find your points this way. Drag top left - reset everything, drag top right - reset X axis, drag bottom left - reset Y-axis. Something along those lines. Resizing the whole UI is also possible via diagonal dragging. Not horizontal or vertical.
Fullscreen mode - possible, but HOLY CARP the fonts are huge!
4) Screenshots and store function
I admire the effort here. But you can only store one(!) plot state - not several. And the screenshots - while you can definitely drop PNGs, it's not only the plot, but also half of the top buttons and the other control buttons. Another question that would instantly pop up from developers viewpoints "can we use the plots in manuals?". Since they're not clean, and actually black (and not a white BG), that is also troublesome
5) does the UI have to be "dark"?
I understand a certain dislike for a "bright UI" - but for such tools, it would be better. Also: pink for L and Cyan for R? Okay...
Other than that, I also had the occasional crash with Cytomic tools, Hornet Plugins, etc. On v1.0.2, Win7 Pro SP1 (Convenience Rollup). The host works "somewhat" fast, sometimes a bit wonky - do I don't know how much AA (2x, 4x, 8x, 16x) was used for the OpenGL rendering. But there is definitely room for more for this tool. Like... certain features on the main UI (frequency selection), an info text that shows in txt form "inputs/Outputs, Latency, etc", custom color setup for L/R channels and UI, "output" module to measure hardware, etc
This feels a bit like Metaplugin all over... great start... but the competition didn't sleep and made better modular subhosts.
Will I buy it?
Not yet. For the time being, I'm more than happy with what I can do with similar if not the same test sequences / test signals and Lightbridge Signalizer. Sans the Phase Response (for the time being, dev working on it) and not a fancy "ramp" view for a compressor. But still. It served me well in recent months,and I did well with other tools after VSTPluginAnalyzer got simply... discontinued. I'm sure they'll keep me company for the next months as well.
I'll keep an eye on this though.