As to the factors which contribute

As to the factors which contribute toward the accuracy of absolute memory for tones, the timbre of the instrument and concentration of attention have been shown to be the most important. Von Kries4 even considers that the slight not immediately discernible differences in the timbre of tones differently struck on the same instrument might influence the judgment. The tuning of the instrument is also likely to influence the judgment if difference in the tuning is very great, though it has not been found that people with absolute memory have a finer pitch discrimination than other musical people.