We cannot use instances like this t

We cannot use instances like this to help us in our decision of pitch. We can only fix the pitch by itself in our memories." Other factors which hinder the development of absolute pitch memory are the variations in the keys in which a child hears the same song sung and played, the variations in the standard pitch for different instruments for different purposes and the use of the tonic sol fa system, where do may sometimes be c, sometimes e, etc.