In the beginning of this scene, there is a quick scene flashed where Codex is talking out loud, which is a prime example of external diagetic sound, where keyboard clicks exist as non diagetic sound overtop of the short line Codex shares.

In the second scene, non diagetic sound occurs from the computer while the two are conversing, presumably from the Guild site. Direct & synchronous sound are simultaneously occurring where small pieces of unedited background noise is occuring as well as a giant stack of books being slammed onto a desk.