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]

## Initialization

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

## 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 589. 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
    ; Audio out   Audio in
    -odac           -iadc    ;;;RT audio I/O
    ; For Non-realtime ouput leave only the line below:
    ; -o printk2.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    ; Initialize the global variables.
    sr = 44100
    kr = 44100
    ksmps = 1
    nchnls = 1

    ; Instrument #1.
    instr 1
      ; Change a value linearly from 0 to 10,
      ; over the period defined by p3.
      kval1 line 0, p3, 10

      ; If kval1 is greater than or equal to 5,
      ; then kval=2, else kval=1.
      kval2 = (kval1 >= 5 ? 2 : 1)

      ; Print the value of kval2 when it changes.
      printk2 kval2
    endin

    </CsInstruments>
    <CsScore>

    ; Play Instrument #1 for 5 seconds.
    i 1 0 5
    e

    </CsScore>
    </CsoundSynthesizer>

Its output should include a line like this:

     i1     1.00000
     i1     2.00000

## See Also

printk and printks

## Credits

Author: Gabriel Maldonado
Italy
1998

Example written by Kevin Conder.

New in Csound version 3.48

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