kamp -- Amplitude of jitter deviation
kcpsMin -- Minimum speed of random frequency variations (expressed in cps)
kcpsMax -- Maximum speed of random frequency variations (expressed in cps)
jitter generates a segmented line whose segments are randomly generated inside the +kamp and -kamp interval. Duration of each segment is a random value generated according to kcpsmin and kcpsmax values.
jitter can be used to make more natural and "analog-sounding" some static, dull sound. For best results, it is suggested to keep its amplitude moderate.
Here is an example of the jitter opcode. It uses the files jitter.orc and jitter.sco.
Example 1. Example of the jitter opcode.
/* jitter.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 2
; Instrument #1 -- plain instrument.
instr 1
aplain vco 20000, 220, 2, 0.83
outs aplain, aplain
endin
; Instrument #2 -- instrument with jitter.
instr 2
; Create a signal modulated the jitter opcode.
kamp init 2
kcpsmin init 4
kcpsmax init 6
kj jitter kamp, kcpsmin, kcpsmax
aplain vco 20000, 220, 2, 0.83
ajitter vco 20000, 220+kj, 2, 0.83
outs aplain, ajitter
endin
/* jitter.orc */
/* jitter.sco */
; Table #1, a sine wave.
f 1 0 16384 10 1
; Play Instrument #1 for 3 seconds.
i 1 0 3
; Play Instrument #2 for 3 seconds.
i 2 3 3
e
/* jitter.sco */