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jitter2

Generates a segmented line with user-controllable random segments.

Syntax

kout jitter2 ktotamp, kamp1, kcps1, kamp2, kcps2, kamp3, kcps3[ , iopt]

Initialisation

iopt -- Optional, controls time of onset of effects. If zero (default) the output is zero until the end of the shortest kcps value. If not zero the effect starts immediately

Performance

ktotamp -- Resulting amplitude of jitter2

kamp1 -- Amplitude of the first jitter component

kcps1 -- Speed of random variation of the first jitter component (expressed in cps)

kamp2 -- Amplitude of the second jitter component

kcps2 -- Speed of random variation of the second jitter component (expressed in cps)

kamp3 -- Amplitude of the third jitter component

kcps3 -- Speed of random variation of the third jitter component (expressed in cps)

jitter2 also generates a segmented line such as jitter, but in this case the result is similar to the sum of three randi opcodes, each one with a different amplitude and frequency value (see randi for more details), that can be varied at k-rate. Different effects can be obtained by varying the input arguments.

jitter2 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 jitter2 opcode. It uses the file jitter2.csd.

Example of the jitter2 opcode.
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<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac     ;;;realtime audio out
;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o jitter2.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

sr = 44100
ksmps = 32
nchnls = 2
0dbfs  = 1

instr 1

ktotamp init p4
kamp1   init .5
kcps1   init 10
kamp2   init .5
kcps2   init 2
kamp3   init .5
kcps3   init 3

kj2  jitter2 ktotamp, kamp1, kcps1, kamp2, kcps2, kamp3, kcps3
aout pluck 1, 200+kj2, 1000, 0, 1
aout dcblock aout
     outs aout, aout

endin
</CsInstruments>
<CsScore>

i 1 0 15 2      ;a bit jitter
i 1 8 15 10     ;some more
i 1 16 15 20    ;lots more
e
</CsScore>
</CsoundSynthesizer>

See also

Random (Noise) Generators

Credits

Author: Gabriel Maldonado, John ffitch

New in Version 4.15

iopt new in version 6.08