chanctrl
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chanctrl

chanctrl — Get the current value of a MIDI channel controller.

Description

Get the current value of a controller and optionally map it onto specified range.

Syntax

ival chanctrl ichnl, ictlno [, ilow] [, ihigh]
kval chanctrl ichnl, ictlno [, ilow] [, ihigh]

Initialization

ichnl -- the MIDI channel (1-16).

ictlno -- the MIDI controller number (0-127).

ilow, ihigh -- low and high ranges for mapping

Examples

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

Example 108. Example of the chanctrl 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   No messages  MIDI in
-odac            -d         -M0  ;;;RT audio I/O with MIDI in
;-iadc    ;;;uncomment -iadc if RT audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o chanctrl.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

instr 1	; press your midi keyboard and move your midi controller to see result

ichnl  = 1		;MIDI note inputs on channel 1
ictlno = 7		;use midi volume controller 
kch  chanctrl ichnl, 7	;to control amplitude of oscil
     printk2  kch

asig oscil kch*(1/127), 220, 1
     outs  asig, asig
endin

</CsInstruments>
<CsScore>
;Dummy f-table to give time for real-time MIDI events
f 0 30
;sine wave.
f 1 0 16384 10 1
e

</CsScore>
</CsoundSynthesizer>


Credits

Author: Mike Berry
Mills College
May, 1997

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

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