Im linux user from 1997,
from XT to AT, fidonet, dialup internet, MSN and AoL,
now build small net player with linux on board. Big thanks to Volumio builders
wrote script to change playlist from IR https://volumio.org/forum/next-and-previous-playlist-t4160.html
thinking about power supply to raspberry and usb or i2s DACs.
make on LM317 or use charger from Galaxy S5? Different sounding???