Really slow (impossible) to train, if some understanding/training for realtive pitch is already present. Try with one single note, training session is over, bec

Really slow (impossible) to train, if some understanding/training for realtive pitch is already present. Try with one single note, training session is over, because at that moment the brain switches to relative mode, and refuses to process absoltute information. A couple (max) of individual stimulations per day isn't sufficient to learn.