Thanks for your response!
It all started with the receiver (high school graduation gift). Over the years I've added bits and pieces but the receiver keeps hanging in there so I've been hesitant to replace it.
I use my receiver and tower speakers to watch TV and movies and listen to music. So basically, for everything. My blu ray and (Comcast) cable box are connected to the receiver for sound using RCA cables, and connected to my TV using HDMI's. Each component has its own input on both my TV and receiver and has been working nicely (enough) for quite some time. I am sure there are many far better ways to accomplish the same end goal. The problem has always been being analog vs. digital. I am not able to use Chromecast or Fire TV Stick and listen through my stereo, not the TV speakers.
I had been toying with the idea of getting a piece to take the place of my inferior TV speakers and (naively) thought a soundbar would be a good solution. I mentioned it in passing and guess what showed up under the Xmas tree?? The more research I am doing in trying to solve my problem, the more I am finding a soundbar was not the way to go. Luckily I have a gift receipt and can return it.
I am thinking it may be time to just suck it up and take the money and put it towards a receiver with HDMI connectivity, which, from what I understand, would solve the majority of my quibbles with my current set up.
I am open to suggestions on an entry-level, but clean sounding receiver to handle two tower speakers and a center speaker. (I live in an apartment so am not really looking to invest in a high end setup right now).
I am still completely confused as to why I could not get the soundbar to work with my TV, but now it's a moot point.
Thanks again and Happy New Year!!