there was this other, similar town pronounced -bruh or -boro that people talked about.

You were so close: Edinburgh only got its name after Edward I invaded Scotland in 1296. Before that it (which was then a larger area than the present Edinburgh) had just been called “the Burgh”, which depending on regional variation would have been pronounced either “burg” or “boro”. “Edinburgh” referred to a smaller area within the Burgh that the king’s guards would patrol more severely due to the perceived increased risk of rebellion due to higher population density.

(/joke)

Reading through their mail merge tutorial, their method looks insanely risky: putting all addresses in “to” and rembering to click another button.

I meant it more in the sense of one channel, when shutting down for the night, emitting the “next channel” tone such that every viewer’s set would change to a channel that was still broadcasting.

Would it have been possible for the speakers of the time to emit those frequencies? Imagining the equivalent of a Twitch raid: “I’m done broadcasting so I’m going to send you to the next channel.”

Thanks will take a look!

Full keyboard navigation (j and k to focus up and down posts, u to go to user profile, c to enter comments…) including toggling expandos, and regex keyword filtering for me.