He finds, as has been before mentio

He finds, as has been before mentioned, that the sureness and exactness of memory is not the same for different notes and octaves. More mistakes were made in the extremes than in the middle octaves. A and C in the different octaves were recognized more quickly than other notes which were named with hesitation and sometimes by reference to c and a. The differences in the tone color of different instruments was a hindrance which led to indirect judgments such as comparing the tone of new timbre with more familiar tones. By continued practice Rupp believes it is possible to reach correct absolute pitch judgments without intermediary aids. A long series of impressions of notes would lead in time to a firm, lasting impression. This may be either acoustic or kinaesthetic memory