Which Os to use ( Moode , Volumio etc.) to get the best output out of Boss 2 Player and which Power Supply.
moode, volumio are not os. They are just set of packaged programs to help a newbie who has very little idea about linux configure it.
The OS is always raspbian whether you use moode, dietpi, volumio, etc. They will all sound the same, unless these distributions consume too much CPU to do their job of displaying an user interface.
I have found moode to be the one that does the least destructive changes to the original OS
I personally don't use any of them and use the Raspbian OS and installing neccessary software (mostly the same ones that moode, volumio, etc do). The advantge of using raspbian directly are
1) Latest updates
2) 64 bit kernel vs 32 bit kernel used by moode, volumio, etc
3) No bloatware. No web server to screw up your CPU usage. Audio can be more pristine because of the lesser CPU usage.
Disadvantage
1) Requires litlle bit of knowledge of linux (basic knowledge - how to login, how to install software, how. to shutdown).
Any Case option to attach a touchscreen to it. Something link the link below
from Vincent Fong video on youtube. (
DIY Raspberry Pi Player Kit Unboxing and Assembly
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That is a standard ribbon cable to connect raspberry pi to a lcd monitor with touchscreen.
How to connect a Raspberry PI to the official Raspberry PI touchscreen or 7 inch LCD touch display. Power and data connections.
startingelectronics.org
If you are going to do lot of diy, you probably need the allo boss2 with the acrylic case and save few ruppees. That vincent fong guy has used precise CNC to adapt the allo boss2 to his diy case. So you too will require access to CNC service to achieve what he did. ALso he is using another distribution named picoreplayer which gives you LMS. So you might want to take a look at that in addition to moode, volumio, etc