Have you explored adding Google Cast support (ie, to allow audio to be sent via Chromecast) to the Axiom Air? This would make it much easier to integrate into existing environments without needing a separate client and would also allow it to be used as part of a Chromecast Speaker Group. (For example, along with the Chromecast Audios that I have connected to the receivers that power my M3 and M22s in other rooms in the house.)

(I've so far been underwhelmed by the interface and connectivity options that shipped with the AA.)

It looks like there is no longer a public API endpoint for this, so this isn't something that could be hacked on by someone in the community.

Erik