When I am typing in the terminal, often I am typing in commands or code without necessarily looking at the screen. Probably this would annoy many people, but for me I would like audible feedback from my typing, so I know when I have mistyped, with alphabetic characters having a certain sound, special characters having their own (or something along those lines).
This has overlap with accessibility concerns, but Outside of Orca, I don't know of much in that area, or whether there is some previous project that is similar... I know that ‘echo -ne '\007' will create a system sound but I don't know how I would hook that into reading a specific character from my input device.
Imagine if you had a terminal open and you had it set to make a soft, but specific noise every time you typed '}'. that way if you mistyped and the shift hadn't registered, resulting in a ']', you would know right away
(in particular my hands have very bad arthritis so it is sometimes harder to fully depress a key so it makes debug a pain and Id rather "stay in the flow" of knowing to listen for a different sound rather than looking up at the screen every couple seconds, but a full on screen reader that reads everything would be a pain in the ass)