Convenient but beware audio lag

I use this case to extract Chromecast audio and everything works perfectly. If the case is connected simultaneously on a string and on television, there is an audio gap that distorts the sound quality. Not necessarily blocking (just plug in the TV audio on the chain) for my use but useful to know ...

Typically:

. Chromecast plugged into the box: 1 RCA output to the chain and HDMI to the TV
. Audio output of the TV to the channel

=> In Chromecast mode allows the audio output does not need to turn on the TV as background music for a play and / or watch another program on the TV
=> In movie mode, I change the channel source to use the audio output from the TV to avoid being bothered by the audio delay.