Amazon Music app limits to HD

[gurulee]

Is this when casting to a single wiim, or just when part of a group?
If you are using alexacast, round cast icon in amazon app, to a single wiim then it should be uhd - if you've set the menu options in the wiim app correctly.

Sync issues would only come into play when casting to more than one speaker other than the wiim speaker and comparing the two. In my case, Amazon echo and the wiim speaker via Sony STR-DH590 via line in.