I have a Raspberry Pi 4 running Raspbian Lite Release 10. I will be running squeezelite on it for it to function as a squeezebox player. I need to have sound output to RCA jacks to plug into my stereo amplifier. I do not need RCA video. I am running the raspberry pi headless so I do not need video at all.
Do I need to enable Composite in raspi-config A8 Raspberry Pi 4 video output options to get RCA audio from 3.5mm jack or is there a sound-only RCA output setting somewhere?
Will I need to change any other settings to have RCA sound output?
Can I use a TRS 3.5mm audio cable with just two (audio) RCA jacks at other end or do I need to use a TRRS 3.5mm audio jack with three RCA jacks. I am worried that using a TRS will short the ground and video contacts.