Does Apple Music Lossless play through the Sonos Port?

Question for the community...I am streaming AM via my Port, and then a Mytek Brooklyn+ to my preamp.

The track on AM is saying it’s in 24/48, but for some reason my DAC is only getting a 16/44 signal.

Any ideas why this might be?

Many thanks.

The line level needs to be set to pass through or fixed, not variable. Even then afaik the output is limited to 24/44.1 but maybe I’m wrong. 

How exactly do you play Apple Music on your Sonos Port? Using the Sonos App? Or directly from AM App and streaming to Sonos Port via Airplay?

I think both could work as Airplay now can stream to non Apple speakers with 24/48 from Apple Music. 
But at the moment Sonos doesn’t support that yet. So imo the only way is using AM directly within Sonos App where you will see the the lossless badge as confirmation. 
If it’s shown, Sonos Port imo will output 24/48 via its digital out. 
But maybe Apple is using just 16/44 as “lossless“ on Sonos api for the same track that is 24/48 in AM app. 
 

Thanks. I tried this and neither fixed nor pass through give me 24/44.1 output according to my DAC.  I must be doing something else wrong.

Thank you.

I’m using the Sonos App - clicking on my AM account and streaming music within the Sonos app directly.

As I said, if I play the same track in the AM app directly, it shows 24/48 (disconnected from Sonos completely)...but if I play the same track from AM within the Sonos app via my port-->DAC-->pre-amp to my external speakers, the DAC is only showing 16/44.1 sample rate.

​@gnahra01 

Ok, in that case I suppose Apple just uses 16/44 lossless cd quality via Sonos API. 

AM Music through Sonos is Max 24/48 kHz. I can see I am getting this from system where an album exists in 24/48 on AM. 

Yes, 24/48 is the max. limit on Sonos. But as far as I know Apple, some time after they introduced lossless on Sonos, switched to a dynamic choose of audio quality depending on network quality, because many people had issues with lossless on poor network performance. 
So my suspicion is, that could be the reason for getting just 16/44 though the track is available on AM in 24/48. 

Btw… how do you check what quality for AM is used exactly via Sonos api when showing „lossless“. Unfortunately there are no different badges like with Amazon Music that show you HD or UHD. 
So I suppose you will have to use a DAC or AVR that shows you what is coming in from a Sonos Port. Or is there any other way?

I’m actually using TVOS app called Bops. Shows now playing info/data from Sonos. 

So Bops app does show more detailed audio information like bitrate than Sonos app itself does? 
In case of Apple Music that would mean Sonos app just shows lossless or not, and Bops app can see from system data if it’s 16/44 or 24/48? This is hard to imagine imho, and if this data actually is provided to Sonos system by Apple, why shouldn’t Sonos app show it!?