printk2
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## printk2

printk2 — Prints a new value every time a control variable changes.

## Description

Prints a new value every time a control variable changes.

## Syntax

    printk2 kvar [, inumspaces] [, inamed]

## Initialization

inumspaces (optional, default=0) -- number of space characters printed before the value of kvar.

inamed (optional, default=0) -- if non zero print the name of the kvar as well as the value.

## Performance

kvar -- signal to be printed

Derived from Robin Whittle's printk, prints a new value of kvar each time kvar changes. Useful for monitoring MIDI control changes when using sliders.

| Warning
WARNING! Don't use this opcode with normal, continuously variant k-signals, because it can hang the computer, as the rate of printing is too fast.

## Examples

Here is an example of the printk2 opcode. It uses the file printk2.csd.

Example 754. Example of the printk2 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
    -odac    ;;;realtime audio out
    ;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
    ; For Non-realtime ouput leave only the line below:
    ; -o printk2.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

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

    instr 1

    kval    randomh 0, 1.2, 20		;choose between 0 and 1.2
    if kval >0 && kval<=.5 then		;3 possible outcomes
    	kval = 1
    elseif kval >.5 && kval<=1 then
    	kval =2
    elseif kval >1 then
    	kval =3
    endif

    printk2 kval				;print value when it changes
    asig    poscil .7, 440*kval, 1
            outs asig, asig

    endin
    </CsInstruments>
    <CsScore>
    f1 0 16384 10 1

    i 1 0 5
    e
    </CsScore>
    </CsoundSynthesizer>

Its output should include lines like these:

     i1     0.00000
     i1     3.00000
     i1     1.00000
     i1     3.00000
     i1     1.00000
     i1     2.00000
     i1     3.00000
    .....

## See Also

printk and printks

## Credits

Author: Gabriel Maldonado
Italy
1998

New in Csound version 3.48

named option new in 6.11

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