Hi… I’ve started a project of building an car radio withtouch screen, bluetooth and Hi-Def optical out based on Raspberry and Volumio, everything is ok,
but i cant really undestand how to play in sequence the file in the folders of my usb without adding them to the playlist.
When i use Volumio in home for testing it couldnt be a problem, but when i’m driving i can not distract too much. 
Thank you!