Get a Chromecast with an HDMI to audio adapter, or an older Chromecast Audio (they don't make them anymore).
One thing that sucks about the TTS options on Hubitat is that none of them have the option of prepending or appending an audio file to your TTS announcement. On my Vera, I use Star Trek TNG sound effects for different types of alerts and I play them before the TTS speech. It's nice because the sound plays which makes your ears perk up so you actually hear all of the TTS announcement. Before I did this, I would only hear what the announcement was saying about half the time.
Also, when the dog hears the Star Trek doorbell chime that was used on personal quarters, he immediately runs to the front door and barks. If I watch an episode on TV and he hears that sound, he goes right to the front door. I use the red alert sound also for things that are critical, like water leaks.
Setting up voice alerts on Hubitat is more work than on Vera from what I can tell. On Vera, I have one scene called "Voice Alerts". I set up a trigger for each thing I want a voice alert on, and then put in the LUA to call Vera Alerts with the sound file and the text to speak, and it's wrapped in an if statement so it won't execute if the chime on my Elk alarm system is turned off, so it's super easy to mute non-critical alerts like the front door opening or someone entering the driveway.
Hubitat guys, please add a feature to voice alerts to prepend or append a sound file to TTS alerts. If I wanted to do this today, it would be a huge PITA.