The blog post for Sonos version 10.3 API update Posted on July 16, 2019 suggests that the
code:
namespace —will work on the upcoming SYMFONISK table lamp with WiFi speaker and SYMFONISK WiFi bookshelf speaker. When we call the endpoint it does not return the audioclip capability for these speakers and when we try and send an audioclip to it it returns:audioClip
An error occurred, there were no speakers with the custom sound capability in this group
Thanks