missing link

Parts 4 and 5, October and November 1977. In Part 4, R I in the input adder circuit (figure 7) is shown as I 00 k. This gives the `Octaves, coarse` control (P l) a range of ± 7 ½ octaves. At a later data, it was decided to reduce this range to ± 5 octaves. In part 5, this modifi-cation was carried out: in figure 2a, R I is shown as 150 k; the front panel lay-out (figure 3) shows a `coarse` range from -5 to +5.