I'm a trained vocalist, but I'm quite shy about singing when there's other people around. My safe haven is the soundproof music room in my building. This is a way to take that wherever I go. (I hear this is also exciting to people who consider themselves not good singers... I fear there is no such thing)
I'm currently learning how to aalaap (improvise) within a given raga, but the most important thing is discipline in following the notes of that raga. I struggle with this. This thing will beep if I go off course