List type 11

The data in these lists determines rhythmic patterns. These patterns are realized by the patch shown above and also in conjunction with list type 12. To determine the rhythm, each number is first converted to either 1, 2, 3, or 5. If the number is prime it becomes 1, if it can be divided by 2 then it becomes 2, likewise for 3 and 5. In the case of numbers that can be divided by more than one of 2, 3, and 5 (such as 12, 15, and 30) the number from the list is converted to the largest number it can be divided by—for example, 30 can be divided by 2, 3, and 5 so it is converted to 5.

Next, these numbers are paired, and each pair determines one rhythmic cell. The length of the cell is determined by the first of the pair and the number and type of articulations is determined by the second of the pair. I've prepared a chart to show each of the cells. [here]

Turning for a moment to the second list on the fourth exon, we can see that the first eight numbers are: 11 57 30 61 38 48 31 27. Using the method detailed above this list is translated as: 1 3 3 1 2 3 1 3, which gives us this rhythm:

Depending on its context this rhythm is either applied to a melody generated by list type 12 or it is articulated on its own. The rhythms are articulated by the manipulation of a band-pass filter on the output of a noise generator. This process is commonly known as subtractive synthesis. By setting the filter to two different frequencies, a primitive electronic percussion sound is produced.