The Raspberry Pi 3B/Hifiberry Digi+/MoOde/HDPlex LPSU player is running well, and it has replaced my PC/JRMC/HDPlex LPSU as my main music source.
Finished Unit (with the HifiberryDigi+ metal case):
Setup
I pull music into the player via wired ethernet. I have a 2TB WD Passport drive connected directly to a TPLink WiFi Router via USB on the Router, that acts like a network storage. MoOde sees the drive folder as an SMB share and indexes the music in it into the MoOde library. I have assigned a static IP to the RPi in the router settings.
I initially used the MoOde interface to play music via an iPad, but I'm too used to seeing and choosing my music visually via CD art, so I'm now using mPad on the iPad to see and play the music. It is a bit clunky as far as album art goes (not all of the folder.jpg gets indexed), but it works very well for my purposes, and it looks good too. I also use Mupeace on my Android phone in case I want to use it to control the player. The iPad app is leaps and bounds better.
Since I got a friend here also to get the Rpi3 + HifiberryDigi+ combo, I was able to compare the following combinations:
Comparison 1 (Power Supply)
A1. Rpi, HifiBerryDigi+ powered by an ipad power Adapter
A2. Rpi, HifiBerryDigi+ powered by the official Stontronics power adapter.
A3. Rpi, HifiBerryDigi+ powered by a HDPlex LPSU
B1. Rpi, HifiBerryDigi+ with power mod powered by an ipad power Adapter
B2. Rpi, HifiBerryDigi+ with power mod powered by the official Stontronics power adapter.
B3. Rpi, HifiBerryDigi+ with power mod powered by by a HDPlex LPSU.
All comparisons are extremely subjective (non-blind), one after the other and not at-the-same-time/A-B. And in some cases, the comparisons were not done at the same time.
A3 > A1 > A2.
B3 > B1 > B2.
B3 > A3 (but not by a very huge margin).
B3 > A2 (night and day! A2 sounds significantly harsh in comparison)
B3 > B1 (improvement is clear, but maybe not worth the extra for a non-finicky listener).
(Note: ">" = "better than")
I'm not mentioning all the possibilities here, but the gold standard for me is the B3 combo. And the relatively (emphasis on
relatively) least best sounding is the A2 combo. Let me say that even the A2 combo sounds quite good, and the sound quality it produces is in no way bad for the money, and I would very well have lived with it happily if I did not already have the HDPlex LPSU or the iPad adapter already with me. (I might have definitely planned for an
iFi iPower or something like that down the line, though).
I'm currently on MoOde 2.7, and to me it somehow sounds a bit better (smoother highs and mids) than the v2.6 I started with, but with the many changes over the last month, I wouldn't be completely sure about this.
Comparison 2 (RPi vs Music PC)
I switched on my Music PC (also powered by the HDPlex LPSU) with JRMC and an iFi iLink USB to SPDIF converter after about a month of listened exclusively to the RPi player. Both work as different sources on the same DAC, so it was easy to switch between the two live, while music is playing. Again, I compared them sighted, but I'd wager that I could identify between the two blind. I prefer the RPi player (with the HDPlex Power) over the Music PC by a
large margin. The basic character of music reproduction is substantially different between the two sources.
The RPi has very distinct layering of instruments and sharp imaging front to back in the soundstage. The width of the stage is identical, but the RPi has truly 3D front to back imaging, while the Music PC has far less stage depth and definition within the stage. The RPi definitely has a faster and somewhat louder bass response, and far better detail and attack. The MusicPC sounds a bit too subdued and polite now, compared to the RPi.
The only aspect of the Music PC that I prefer over the RPi is the far superior file handling of JRMC. JRMC handles tags (esp. for WAV files), album art, and cue sheets far far better than MoOde (or mPad) does. My tagging is handled perfectly in JRMC, but some of the music shows up rather weirdly tagged in MoOde and mPad (mPad is an improvement over the MoOde library). But considering that I don't have to switch on my TV (i use it as a monitor for the Music PC) or use a mouse/keyboard to listen to music with the RPi, I'm happy with what I'm getting from the RPi/MoOde.
Special thanks to Rikhav again, for putting up with my constant badgering, and for being an awesome friend!