jitter — Generates a segmented line whose segments are randomly generated.
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 file jitter.csd.
Example 222. Example of the jitter opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o jitter.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; 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 </CsInstruments> <CsScore> ; 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 </CsScore> </CsoundSynthesizer>