I suspect there’s no way to avoid this, @josh, but I wonder if you have any guesses. When playing a file (PlayTrack) to my Google speaker (via the cast-api), prior to playing the file, the Google Speaker plays an audible tone. It’s kind of like an audio acknowledgement that it is waking up to do something. Does that make sense?
I wish there was a way to have it simply play the file and not sound a tone first. Like I said, this is probably something coded into the Google speaker and not something we can control. Just thought I’d throw out the long shot question.