That’s excellent, thank you. I did think it was going to be something like this. I can see the Auto Activate check-box now. I had checked through the details panel a couple of times before and somehow missed it.
I don’t suppose you have a link to some documentation about blueprints that mentions this or advice with how to find it? This is something I should have been able to see for myself, but the audio component documentation I could find didn’t mention it.
Thanks for the quick answer.