initc7

Initializes the controller used to create a 7-bit MIDI value.

Syntax

initc7 ichan, ictlno, ivalue

Initialization

ichan -- MIDI channel (1-16)

ictlno -- controller number (0-127)

ivalue -- floating point value (must be within 0 to 1)

Performance

initc7 can be used together with both midic7 and ctrl7 opcodes for initializing the first controller's value. ivalue argument must be set with a number within 0 to 1. An error occurs if it is not. Use the following formula to set ivalue according with midic7 and ctrl7 min and max range:

ivalue = (initial_value - min) / (max - min)

Examples

Here is an example of the initc7 opcode. It uses the file initc7.csd.

<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac   -M0  ;;;realtime audio I/O with MIDI in
;-iadc    ;;;uncomment -iadc if RT audio input is needed too
</CsOptions>
<CsInstruments>

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

instr 1 ; expects MIDI controller input on channel 1
; run and move your midi controller to see result

imax = 1
imin = 0
ichan = 1 
ictlno = 7

        initc7  1, 7, 1                 ; start at max. volume
kamp    ctrl7   ichan, ictlno, imin, imax       ; controller 7
        printk2 kamp
asig    oscil   kamp, 220, 1
        outs    asig, asig

endin

</CsInstruments>
<CsScore>
f 1 0 4096 10 1

i1 0 20

e
</CsScore>
</CsoundSynthesizer>

See also

MIDI input and Initialization

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.