Hey piano. I've learnt most of the intervals now and when I try and play a melody by ear (made up by an ear training program) which only consists of 3 or 4 intervals, I can pick out the 1 first interval, maybe the 2nd, but find it extremely difficult to single out the 3rd and 4th intervals, it's just a bit overwhelming for my ears/brain to process. It may be a case of me having to practise more, im not sure.