Does anyone know a good way to hide the gizmos that show up on objects with a sound attached to them (or any gizmo for that matter)?
They’re great and all, but when you get a ton of those objects together in a scene it becomes nearly impossible to see what going on in the viewport. Thanks!
Not that I know of 
sorry :(.
But that’s a good suggestion for the wish list! 
(if there is no way)
If you mean all gizmos (and I think you do), you could simply turn them off with the button at the right-top of the game window? 
(Maximize on play / Gizmos / Stats)
Thanks for the suggestion. If I’m not mistaken, this appears to only toggle gizmos in the actual “game” view. That’s exactly the functionality I’m looking for, but I’d like it in the “scene” viewports. Any other ideas?