If Amazon doesn’t know what ‘xxxx’ is, than it stops right there. It’s not much different then if you were playing on echo speakers, just that it would skip Sonos servers and pass directly back to your speaker. If you ask to “play xxxx”, Amazon will validate that playing xxxx is a valid request, pass it on to Sonos servers, which then passes it down to the Sonos speakers in your home. For the most part, your voice command goes to Amazon cloud to be interpreted and processed. Considering how Alexa voice works, it’s not surprising really. But I wouldn’t even say it’s a matter of “don’t want it to work”, but “do not think the effort of developing the feature” is worth it. Like I said before, that would mostly be Amazon. Either Sonos or Amazon or both, do not want this to work! So Alexa should or rather could know about your Sonos music library. Sonos has the ability to add the Amazon music service.

It’s these greedy companies that want you to stream music from them for a monthly fee. Not to mention the need to produce new speaker products, since that’s how they actually make money. And again, because of the small market size, I expect them to focus on streaming services like Spotify with bigger markets, and additional language support. However, since it wasn’t supported from the beginning, it leads me to think that it’s not a technical no brainer. Your best bet would be for Sonos Voice Control (SVC) to start supporting local libraries. They would only care if Google Assistant supported it or something, and thus they had to do it in order to keep customers. They don’t care about your local library or supporting it.

Second, we’re talking about Amazon Alexa, which essentially exists for the purpose of keeping people in the Amazon ecosystem and spending their money there, whether it be music streaming, buying goods, etc. If there is a resurgance in use of local libraries, like there has been for vinyl for whatever reason, then maybe it has a chance. No doubt that a lot of the people who use local libraries do so because they don’t want to use cloud services like Alexa, making the market even smaller. Businesses tend to focus efforts on things that more people care about, not less. As I’m sure you know, the market size for people using local libraries is getting smaller, not larger. I’m not sure why you’re thinking the feature is more likely to be implemented as time goes by. Okay, it is now January 2023, and evidently you still cannot play music from your Sonos indexed music library using Alexa.

Stream player app for echo