Chromecast with Google TV audio sync/delay issues get a workaround
Amazon.com: NAMCIM Wireless HDMI Display Dongle Adapter, Laptop/Pad/Phone to HDMI Adapter, NO Setup, NO APP Required, No Delay, Streaming Video/Audio from PC, Smartphone to HDTV Projector : Electronics
6 Ways to Troubleshoot Chromecast Audio Issues
Chromecast audio delay (Projector to avr receiver) : r/Chromecast