initc7 — Initializes the controller used to create a 7-bit MIDI value.
ichan -- MIDI channel (1-16)
ictlno -- controller number (0-127)
ivalue -- floating point value (must be within 0 to 1)
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)
Here is an example of the initc7 opcode. It uses the file initc7.csd.
Example 469. Example of the initc7 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 -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>