And ESB (very well regarded in the mid '80), Opera, Giussani Research, Rosso Fiorentino.
On the driver manufacturers side add Ciare & 18 Sound (now both owned by B&C) and Lavoce Italiana.
Attached: ESB 7/05 & 7/06
IIRC Audiolense used a proprietary filter topology, here a quote from Bernt Ronningsbakk (the creator of Audiolense) in the old Audiolense User Forum:
"The filters are not based on any of the typical suspects. They are
completely in-house design, and the design criteria was to optimize the time...
1 & 3 on Firefox 87.0 b6 64 bit (Windows 10 x64)
1 & 3 on Microsoft Edge 89.0.774.4 64 bit (Windows 10 x64)
1 & 3 on Chrome 87.0.4280.88 32 bit (Windows 10 x64)
1 & 3 on Firefox Mobile (Android 10)
If I'm not wrong, you can setup Loopback to route multiple sources to the same input, like in your example, a soundcard ADC input plus a streaming service app routed at the same time to your convolver app.
Is your responsibility to play one source at a time.
In the above example, the crossover and room correction has to be configured using Audiolense XO (you can find a very well-written tutorial by Mitch "mitchco" Barnett here).
Using Spotify Connect you can use the app installed in your mac mini (or Windows PC) as a streamer which is driven by...