Amazon Firestick Audio Problems

I hate watching TV shows or video on my computer, and a friend recommended buying this for Amazon Prime shows. So I’ve watched Bosch, Goliath, and the Expanse, and they all have audio problems when using this device. It does not seem like the audio is synced with the TV audio. I’ll listen to a TV program on say 35 on the TV volume adjuster, and I need to crank it up to 70 to hear a program with the Firestick, and it’s not clear either. I am using the TVs internal speakers, not external ones.

I have not figured any way to adjust audio directly for the Firestick either.

Anyone have any thoughts? Thanks.