outkat
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## outkat

outkat — Sends MIDI aftertouch messages at k-rate.

## Description

Sends MIDI aftertouch messages at k-rate.

## Syntax

    outkat kchn, kvalue, kmin, kmax

## Performance

kchn -- MIDI channel number (1-16)

kvalue -- floating point value

kmin -- minimum floating point value (converted in MIDI integer value 0)

kmax -- maximum floating point value (converted in MIDI integer value 127)

outkat (k-rate aftertouch output) sends aftertouch messages. It works only with MIDI instruments which recognize them. It can drive a different value of a parameter for each note currently active.

It can scale the k-value floating-point argument according to the kmin and kmax values. For example: set kmin = 1.0 and kmax = 2.0. When the kvalue argument receives a 2.0 value, the opcode will send a 127 value to the MIDI OUT device. When the kvalue argument receives a 1.0 value, it will send a 0 value. k-rate opcodes send a message each time the MIDI converted value of argument kvalue changes.

## Examples

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

Example 710. Example of the outkat 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 -Q1 -M0  ;;;realtime audio out and midi in and out
    ;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
    ; For Non-realtime ouput leave only the line below:
    ; -o outkat.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    sr = 44100
    ksmps = 10
    nchnls = 2

    instr 1

    ikey notnum
    ivel  veloc

    kvib linseg 100, .5, 120	;vary aftertouch in .5 second
    kvbr = int(kvib)		;whole numbers only
    outkat 1, kvbr, 0, 127		;assign aftertouch on
    printk2 kvbr			;external synth for example to
    midion 1, ikey, ivel		;change depth of filter modulation

    endin
    </CsInstruments>
    <CsScore>
    f0 30 				;play for 30 seconds

    e
    </CsScore>
    </CsoundSynthesizer>

## See also

MIDI Message Output

## Credits

Author: Gabriel Maldonado
Italy

New in Csound version 3.47

Thanks goes to Rasmus Ekman for pointing out the correct MIDI channel and controller number ranges.

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