I'm using a TVision HUB with Google TV (which is essentially a T-Mobile branded Chromecast with Google TV) on a Philips monitor, which has really bad speakers. I was wondering whether there's a way for me to stream the audio from the Google TV to an AirPlay speaker I have or whether there's a way to use the 3.5mm jack on my monitor to output its audio to the AirPlay speaker. Open to using dongles/adapters as needed.
If u have an Alexa speaker lying around u can have it 24/7 Bluetooth paired to it and then run a 3.5mm to a stereo system. The only annoying thing about that setup is that if you control the volume with your remote like I do and I need the Alexa to be at almost Max so I can turn it up and down like I like if Alexa does say anything she's going to say it at her volume that it's set so as an example I have Alexa set to 9 out of 10 but my Android TV is set at half volume or even low volume and whenever Alexa says anything she's saying it at the full 9 out of 10 volume which is kind of annoying and can be a bit jarring depending on the time of the day other than that it works fine you can also buy a very inexpensive Bluetooth dongle with the headphone jack.
The easiest way is if airplay speakers have Bluetooth. I've been using Android tv boxes with Bluetooth speakers for years. I have used a Bose portable Bluetooth speaker for when I put the tv in the back patio. I use Alexa speaker in a bedroom all paired through Bluetooth. Works well.