Why is the volume level of dialog so inconsistent on Blu-ray discs?

Episode 1341 (2:07:45)

Joe from Ventura, CA

Joe wants to know why the volume of dialog audio tracks so inconsistent whenever he plays Blu-rays. It's very annoying. Leo says that the TV speakers don't understand the channel information in order to route the audio properly. Dialog is mixed to come out of a center channel, so it doesn't get reproduced as intended. The TV may have a setting that can address this, but having a home theater system is a better way to go.