TCL Alto 8+

General settings
Sound modes
Press , then (up/down) to select
among 3 different sound modes:
MOVIE/MUSIC/NEWS.
Audio sources
Press , then (left/right) to select
among different audio sources:
FTV/Bluetooth/Optical/HDMI ARC/USB.
FT BT OPT HDMI ARC USB
MO IE
MUSIC
NEWS