I would consider that an "MC Library Client" rather than a "DLNA Renderer".
Yes. Jim said that. It would be both.
It would be MC, built for you, on Linux. That would certainly include both a MC Library Client and a DLNA Renderer. You can do this now, they'd just be doing it for you.
Even then the DSPs would mainly be important with analog audio output (since your AVR would most likely process the digital output)
I disagree. Why would your AVR do all of the processing?
I use MC for most of my processing, because it does a better job, and is far more flexible. I send my AVR PCM via HDMI. About the only thing my AVR does is Room Correction, because setting up MC's Room Correction is too complex. If it had a simpler system, I'd use that too.
I'm not sure how that plays in, technically. It is actually better than your AVR, in almost all ways, if you have an AVR.
That said... That's certainly a big part of why I'd argue that a value proposition here for many targeted consumers is not a sure thing. Its essentially selling the part of the AVR that does all of the "stuff", less the amp, HDMI switch, and DAC stages. It'd do network streaming like an AVR, do file format decoding like an AVR, etc, etc, and send out multichannel PCM. That's pretty cool, as it allows you to use whatever amp and DAC stages you want.
But the problem is that, in all but the highest end markets, you're not going to be able to buy an amp and DAC for a reasonable price in order to "recoup" the cost of the JRiver Audio Box. You're going to end up buying an AVR (like I did) and then not using any of those features and using it like a glorified HDMI switch and decoder (which is what I do, and I almost never change the HDMI switch from port one), which makes your average consumer feel like
that money is wasted (even if the AVR software, interface, and often hardware asics are all terrible, as they often are).
I feel like if you want to sell at that high-end, where people will already have and want their own hand-picked discreet power amps, that they're going to want a high-quality, well-supported, integrated DAC to go with it.
Now, perhaps if JRiver had some kind of partnership with a DAC vendor (or better, a handful) where you could buy USB DAC X and plug it in and it would Just Work, they'd have something. I don't know, but I'm guessing that Linux drivers for those DACs are an even bigger crap-show than they are on Windows and OSX (which is bad), though, so I'm not sure how realistic that is of a target...
Without that, you're selling a $400 powerful pre-amp and processor, but I'm not sure there's a big enough market.
That's why I think you position it as
both this, and a file-server for your home. Then, you get two potential classes of consumers. But, it would take some work to make that Storage configuration possible on a headless box, and reliable with a variety of USB storage devices on Linux.
I think it could work quite well, though. You plug it in. Plug in a USB drive (which can be anything from a WD My Book type drive, up to a big RAID-in-a-box thing with a USB port on it). It creates a SMB share and plunks it on the network, sets up MC to auto-import anything on the share, runs both the Library Server and the DLNA server, and lets you plug in a nice device via HDMI if you have one nearby. It lets you use Gizmo and JRemote out of the box (just gives you the access key via that web UI I was talking about), and if you open the port on your router, you can stream the stuff on the road too.
The storage and serving part is a substantial stumbling block for a LARGE class of potential JRiver customers. People would like to have this stuff, but setting up the storage and server aspect (leaving that PC on all the time, and maintaining it) is a big part of the issue. If JRiver could help solve that problem, even somewhat simply... You don't have to try to do the whole FreeNAS thing (though why not use ZFS if you're building it as a Linux box anyway), but it should help people like my friends who come over and see my setup and WANT it, get it, with this plus a 3TB USB drive or two, and a little Intel brick.
Again, I think Video is an
even better value proposition (especially if it does all of the above too), but without it? I'm not sure it works at all, and I'm reasonably sure it doesn't work at any kind of volume without a better message, and some more thought. Of course, it depends on what scale they're trying to achieve too... So, meh?
All I can really say is...
I wouldn't be interested without quality video support and Theater View, and I'm not sure I'd recommend it to my Dad either. But, the biggest reason is I've
already built all of the above, but I'm a capable sysad. If it could solve more problems than just receiving and playing media stored elsewhere... Then maybe you'd have something pretty special,
and worth $400-$500.