Apple MA434Z/A User Manual - Page 950

You might have guessed that rnd(1.05) is between those, but it in fact equals .0174, not .458. This is why it is called discontinuous noise. Examining the neighboring values does not help you to arrive at a safe guess for the in-between values. For this reason, frequency changes have no practical effects on the curve. rnd(time) Setting Ranges for Expressions The noise generators return values between 0 and 1. sin() and cos() return values between -1 and 1. To adjust the range, use addition and multiplication. For example, suppose you want to spit out values between 100 and 400. To make a noise generator do that, subtract the low value from the high value. This is your multiplier. Then add the lower value of your range. Thus, you have: noise(time)*300+100 As cos and sin return values between -1 and 1, you have to offset the output by 1 and multiply by half of the difference between the two: (sin(time)+1)*150+100 noise(time) noise(time)*300+100 Modifying Noise You can use other functions like ceil(), floor(), or round() to help you break a curve into steps. Ceiling pushes a number to the next highest integer, floor drops it to the next lowest, and round rounds off the value. 950 Chapter 31 Expressions and Scripting