Hi ​@Kschmidt345 

Welcome to the Sonos Community!

Sorry to hear of the issue you are having with getting audio for some content via your projector.

Checking the technical specifications from Epson, I can see your projector does not have eARC, so you will not be able to play certain higher-quality formats like TrueHD (Atmos MAT) or McLPCM, but that does not explain why it is older content, specifically, that is not playing.

Worryingly, YouTube generally outputs stereo PCM, which is considered somewhat of a fall-back, as it should always work.

When playing some of this older content (and YouTube), what is reported as playing in the Now Playing section of the Sonos app while the Arc is selected as the current room?

Please also post a screenshot of the audio settings of the projector - the answer may lie within.

Hi Corry,

Thanks for the reply!

^^This is a pictures of the settings for projector.

^^This is a screenshot while a YouTube video is being played. It comes out of the Arc but is barely audible.

This is a screenshot watching a show on Amazon Prime. 

Not sure if this will help at all. Let me know if you need more information! 

Hi ​@Kschmidt345 

Thanks for the pics!

Although having “Auto” selected as you currently do is basically the right thing to do, I am also wondering if this is where things are going wrong.

Before we try changing any settings, lets just make sure it’s not something simple - please unplug the Projector from power for at least a minute.

If that changes nothing, please go to the projector’s audio settings shown above and select Manual instead of Auto, then go down to the list of formats and enable Dolby Digital (not Dolby Digital Plus) and DTS (not DTS-MA/DTS:X/DTS-HD). If Stereo PCM is listed there too, please select it as well (but also try with it unselected too, if YouTube has not improved)

If all else fails, I presume you have a TV too? Please try connecting your Arc to it instead, if only to give you the confidence to fight your corner with Epson - if the above does not help, I suspect there is an issue with the projector.

I hope this helps.

Hi Corry,

Thanks for the tips. I tried everything and it still didn’t work. 
 

I hauled my Arc up to my TV, plugged it in and everything worked. The Epson projector is definitely the issue. 
 

Thanks for all of your advice, I really appreciate it! 
 

Hi ​@Kschmidt345 

You are most welcome! I am only sorry to hear that it did not actually help!

You might also check to see if the projector has an audio level adjustment. If so turn its level to maximum (if it can’t be adjusted on the fly) and adjust sound levels going forward on the Arc. You’ll have too remember to turn the Arc level down after watching content  whose sound levels were acceptable before the change made on the projector to avoid too loud levels at start. Kind of a hassle I know.

Update! 
 

The problem was the android TV stick. For some reason the audio was not talking correctly with the projector. I plugged in an Amazon Fire stick and all of the apps work with sound now. 
 

Hi ​@Kschmidt345 

Fantastic - thanks for updating the thread!