But you can also resurrect stillborn.
Some time has passed and new components are on the market.
I throw my streamer solution into the ASR ring.
After
@voodooless suggestion I call it YA
PiS
+.
RaspberryPI as computer hardware and e.g. Topping DM7 as USB DAC and IMG Sta2000d as amplifier.
(USB or HDMI DAC and amplifier according to your taste).
I listen for a long time with this and I can say it runs stable.
Any DLNA Upnp controller can be used as a source. I use BubbleUPnp for Tidal and local/NAS media. VR Radio for internet stations (there Bubble is a bit chess on the chest).
As hardware platform I use Raspberrys Rpi3b+ and Rpi4, brand new with PiOS64.
Three software components run on the RPI:
1) as renderer umpmdcli
2) as DSP CamillaDsp
3) as StartStop Service Cleanshut
That's all I need to process the streamed input.
I use CamillaDsp to do the crossover and room correction (65k FIR filters), since my bare speakers only have drivers and cables.
CamillaDsp is a powerful tool and all sorts of sound manipulations can be done there. If you like it "pure" you can also use it just for balance control.
What I added for the usability, therefore the plus sign at the end of the name, is the start stop service.
There is only one pushbutton for my system to switch everything on and also to switch it off again. This is more than just a high WAF factor.
A quick push makes the Rpi power up the DAC and turn on the amp before starting CamillaDsp. Then anyone who can operate BubbleUpnp or other controller (Foobar2000.....) on the smartphone can listen to music.
A longer press on the button (2-3 sec) first turns off the amplifier and then shuts down the RPI and turns off the DAC. I just didn't manage to use less than one button ;-)
To load the individual parameters / settings for the DSP I use a USB stick which transfers the new configuration to the RPI when it is plugged in. So even Linux laymen can do the individual settings.
CamillaDSP also has a WebGui user interface, but I haven't used it yet.
Here is the prototype (still needs a nicer box)
and teardown
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