Here's just another idea/option for a processor....a QSC Q-Sys Core110f.
https://www.qsc.com/products-solutions/q-sys/processing/core-110f/
It is an 'open architecture' Linux device where you build whatever schematic you want on your PC with Q-Sys Designer software, which compiles it onto the Core110f (or other Core model).
There is extensive, easy to follow on-line training for Q-Sys Designer, which can run on a PC in emulation mode, not needing a Core processor.
training.qsc.com
So a person can see if the whole idea works for them without having to buy a Core,.... short of being able to actually process signal flow.
The 110f has 8x8 balanced mic/line I/O, with another 8 flex channels that can be individually assigned as either input or output. USB 8x8.
The flexibility is mind boggling. Besides being able to route however you want with whatever type filters, xovers, etc you want,, Qsys allows as many presets that can change as little or as much of the design as you like. For instance, with a mouse click i can instantly switch a 5-way system between all linear phase xovers to all minimum phase xovers, to any combination in between. Xover frequencies, EQ's, shelving etc etc, ...anything can be made into a preset. It switches FIR files on the fly without glitch or tick. 8 channels of 4k FIR taps per channel run fine, I think maybe 10 channels is about the 4 k per channel FIR limit.
Here's an example list of some of the components that can go into a schematic.
View attachment 178199
Stability is rock solid. And if you're concerned about dangerous input levels from a PC source or something, just place output limiters into the schematic.
You can build a User Interface to run on a PC or any IOS device. Right now, i have this on my laptop which controls
settings via wi-fi for the 5-way schematic that follows.
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The cons are: 48kHz only, if that matters to you.
USB says 16, 24 bit selectable, but I still need to find out how to set 24 bit. I haven't bothered because it's easy enough to keep digital signal high throughout a schematic, and attenuate analog at the end.
It's ADC and DACs are fine to my ears, but i know folks can be choosy on this.
And of course, if using FIR, the files need to be supplied via rePhase, Audiolense, Acourate, DRC, etc, etc...(I use FIR Designer, but only for speaker building...I've yet to do any room correction, but easily could if desired.)
Price. New is kind of high, in the low-mid $2000 range. Ebay has seen many trade used for around $1250, but it takes patience and diligence to nab one at that price.
Oh, some more pros....metering and test components that can be placed in the schematic. Peak and RMS meters can be placed anywhere.
A real time dual channel FFT can be inserted. (using QSC amps with dataports connect via ethernet, both peak and RMS amp output voltages can be monitored which i find fascinating to observe sometimes).
Maybe the biggest pro, is that Qsys is software based and doesn't require new hardware every time improvements are made. It has made a major impact in the install world and is constantly being improved/expanded (without charge).
Anyway, just another option, off of the usual home-audio track.
Q-sys has really changed my audio world, opened my eyes. It is sooo easy to experiment with. Hope this was at least interesting