Oh, and also: "The setting to have autoplay content automatically muted is in Chrome 64’s permissions bar. Unfortunately, this isn’t a one-and-done setting — i

Oh, and also: "The setting to have autoplay content automatically muted is in Chrome 64’s permissions bar. Unfortunately, this isn’t a one-and-done setting — it has to be done for every website you want it applied to — but it will mute sound for any content that is navigated to under the parent domain."