Figure 1. Convergence point at middle of Study No. 14 (score, page 3)

Canon is in two voices (bottom voice is two staves in bass clef, top voice is two staves in treble clef); CP takes place at beginning of second system. Arrows illustrate selected echo distances. Dotted lines show potential points of simultaneity; the convergence period is the distance between potential simultaneities. Notice that in the fifth convergence period before and after the CP, the echo distance equals the length of the convergence period—a distance from the CP that is functionally related to the ratio 4:5