Specifying device in configuration file / forcing tui to use specific device

[ciembor]

I work on the radio clock based on Raspberry PI (without keyboard, just knobs). I must be sure, that spt that runs all the time in tmux uses spotifyd as output even if I used other devices in a meantime. So what I need - whenever tui interface is used (starts / changes song) it makes sure it uses spotifyd device, not phone nor some other computer.

Doable? Hard? Would such PR be accepted?