However, I also see now some references to the following additional command that might work for me:
pi@moode: ~ $ sudo apt-get dist-upgrade
Happy Holidays to everyone!
In revisiting this last night using the new Pi3B+ board and some pointers from the folks on the DIYaudio forum, I now have Moode 4.0 running smoothly on the new Pi3B+ board, though officially still unsupported as evidenced by the "Unknown Pi model" in the Platform Information pane's hardware revision field:
It turned out the following command did the trick:
pi@moode: ~ $ sudo apt-get dist-upgrade
What that did apparently (and likely what I should have done from the start) is upgrade the version of Raspbian Stretch to the latest 3.13.18 distribution.
I had originally followed the build instructions warning that only the 11.29.17 version of Stretch would work, however it seems that warning was really just to let you know that later distributions were untested/unsupported by the developer.
In any event, this does seem to work just fine and I only see references to the WiFi still being broken as remaining issues. Not relevant in this install as it utilizes Ethernet, but I'm sure that will be straightened out easily enough as it comes down to the distro's default country code for WiFi being "GB", which will work nicely in the U.K. but probably nowhere else.
I will be curious to see if Moode's in-place updater function will now work on this instance of 4.0 when the 4.1 update is made available: specifically will it retain compatibility with the new 3B+ board? That would be too easy for me, however the developer had warned previously that older builds would likely need to be scrapped and rebuilt from scratch. I'm hoping thats not the case now that this build is running on the latest Raspbian Stretch distro.
I also note an improved look to the (free) web browser interface:
Beyond Moode itself, I do find this newer 3B+ version of the RPi board to be superior in terms of snappy response. While not in the category of "revolutionary" by the Raspberry Pi foundation's own description, this evolutionary update to the board is a solid improvement with the new slightly faster CPU, and Gigabit Ethernet.
I also suspect those making use of the newly improved 802.11ac WiFi capability might find an even greater advantage in using a new Pi 3B+ as opposed to the older boards.