Simple, clear and consise. I can tell exactly what's going on with a quick glance at the menu icon. I'm always trying new menu icons, but I always end up back here.

Ok, this one only lasted an hour yesterday morning. With contacts coming and going during the day, the "contact on" and "contact off" sounds quickly become annoying and almost grate on the ears. (Good job on capturing the essence of tritones!). I really like the other sounds, but I think the contact on/off sounds should change. IMO, it's gotta be short, simple, and something that's easy to ignore if you're busy with something else.

Even better than Elysium! Very creative use of tritones. I really like the symphonic set. Easily 5 stars (more if I could). This one did get me to switch away from my Starcraft soundset. Ima leave this one on for a while.

Very pleasant sounds. I give this a 5! If I ever stopped using my Starcraft soundset, this is the one I'd turn on.