Mixing by ear will allow you to play a wide variety of music with almost any equipment , it really is worth learning . What if your playing an old disco track where the tempo drifts from the live drummer ? Only your ears are going to help keep it in time . <| sep |> Sort of irrelevant , but the scientific inaccuracies are getting kind of annoying . Two O parents do not have to have an O child , the child could also be O if both parents are O . <| sep |> I ' m considering the upgrade as its been workign well on PC since i ' ve started using it , but want to make sure the pro will work on android mobile as the free one only connected for a few weeks early on . I ' ve just sent an email and am waiting to hear back . I was also concerned about the long term support of the VPN in China , but it seems a lot of Chinese are using it based on posts from their facebook page