Ray F. Badness

“appears on 3 and 7 in 1/8 quantization, it will move to 5 and 13 in 1/16 quantization. Likewise, it will move to 9 and 25 in 1/32 quantization. Refer to Table 5 and note that these pairs of numbers all represent the same moments in time.
How did I determine where the Snare would appear? It's simple. Let's take 1/16 quantization for example. To get the first number, multiply the denominator of the quantization by 1/4 and add 1 ((16 x 1/4) + 1 = 5). The second number is attained in a similar fashion. Multiply the denominator of the quantization by 3/4 and add 1 ((16 x 3/4) + 1 = 13). I told you it was easy. Using this mathematical algorithm”
― Ray F. Badness, Drum Programming: A Complete Guide to Program and Think Like a Drummer