NOTIFICATION SOUNDS

When I first joined I could chose between a few sound options for each server but now it seems I'm stuck with the quack sound for all of my servers, with no option to change. I would very much like to have a way to differentiate between my server messages on my phone. It doesn't have to be 100% customizable, just something to let me know if the message coming through is work or play without having to look at my phone each time.