Full question: If i plug tv into optical in, and send the optical out to my dac, will the wiimpro pass the tv signal when the unit is off? how can i switch to tv?
The WiiM Pro won't pass the TV video signal, only the audio from its optical port. You can set the auto detection of audio input such that WiiM Pro will be automatically switched to SPDIF input mode (TV mode) whenever there's audio detected from the interface no matter which mode the device is previously at.