The ability to control the RGB notification LED (and the vibration motor) via the audio engine made for some really nice notification effects (and the ability t

The ability to control the RGB notification LED (and the vibration motor) via the audio engine made for some really nice notification effects (and the ability to differentiate between dozens of different types of notifications at a glance, or even at a feel) was great. There were a lot of HoH people who loved the fact that notifications were differentiable by feel.