John Arezzi has a podcast where they go through tapes of his weekly 1990s NYC radio show. At around 1:07:00 in the link below, John points out Meltzer calling in two shows in a row with the chirp in the background. "That is the most annoying sound in the fucking world" says John. On the newest episode, about a show from 34 days after, Meltzer is on again with the chirp still there!

https://www.youtube.com/watch?v=Di1iziSSpsE