[plamzi]

Not much work involved in getting the existing client to play a sound, especially if you are already recognizing it by one of the multiple ways it announces itself. You can do:

Just preface < and > characters with ESC (ASCII decimal 27/hex 0x1B/octal 033).

Obviously, you can play your own sounds as long as they are web-accessible. You can even record a sound saying "A new player has logged on to Suchandsuchia".

Also, for just a ding sound, the app will now recognize ASCII decimal 7, the conventional TELNET BEL character.