jitter

jitter — Generates a segmented line whose segments are randomly generated.

Description

Generates a segmented line whose segments are randomly generated.

Syntax

kout jitter kamp, kcpsMin, kcpsMax

Performance

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.

Examples

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>


See Also

jitter2, vibr, vibrato

Credits

Author: Gabriel Maldonado

Example written by Kevin Conder.

New in Version 4.15