With my fire stick, Hulu and all other platforms play in Dolby digital on my Polk home theater system. The light on the Polk system glows green to indicate so. But with chrome cast, it broadcasts in standard audio (light glows red) , except when playing Netflix. Are there any fixes to optimize the audio across all streaming platforms?
Thanks for reaching out. Where is your Chromecast plugged into, is it on the TV or on your Polk home theater system? Please try to plug in your Chromecast into a different HDMI port on your TV/AV Receiver. Rebooting your Chromecast and plugging it on a different TV screen might also help.