Description

Allows a floating-point 21-bit MIDI signal scaled with a minimum and a maximum range.

Syntax

idest midic21 ictlno1, ictlno2, ictlno3, imin, imax [, ifn]

kdest midic21 ictlno1, ictlno2, ictlno3, kmin, kmax [, ifn]

Initialization

idest -- output signal

ictln1o -- most-significant byte controller number (0-127)

ictlno2 -- mid-significant byte controller number (0-127)

ictlno3 -- least-significant byte controller number (0-127)

imin -- user-defined minimum floating-point value of output

imax -- user-defined maximum floating-point value of output

ifn (optional) -- table to be read when indexing is required. Table must be normalized. Output is scaled according to the imin and imax values.

Performance

kdest -- output signal

kmin -- user-defined minimum floating-point value of output

kmax -- user-defined maximum floating-point value of output

midic21 (i- and k-rate 21 bit MIDI control) allows a floating-point 21-bit MIDI signal scaled with a minimum and a maximum range. Minimum and maximum values can be varied at k-rate. It can use optional interpolated table indexing. It requires three MIDI controllers as input.

	Note
	Please note that the midic family of opcodes are designed for MIDI triggered events, and do not require a channel number since they will respond to the same channel as the one that triggered the instrument (see massign). However they will crash if called from a score driven event.

Examples

Here is an example of the midic21 opcode. It uses the file midic21.csd.

<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac -M0 --midi-key-cps=4 --midi-velocity-amp=5   ;;;realtime audio out and realtime midi in, midi key cps is routed to p4 and velocity to p5
; For Non-realtime ouput leave only the line below:
; -o midic21.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

; by tgrey - 2020

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

instr 1
	; This example expects MIDI controller input on channel 1
	; run, play a note and move your midi controllers 1, 7, and 10 to see results
	ictlno1= 1 	; = cc #1 midi mod wheel (course tuning)
	ictlno2= 7 	; = cc #7 midi volume (fine tuning)
	ictlno3= 10 ; = cc #10 midi pan (extremely fine tuning)

	; max range is 4 octaves: (2^4) = 16
	imax  = 16

	; read all 3 controllers, scaling them between 1 and imax
	kTune midic21 ictlno1, ictlno2, ictlno3, 1, imax	
	printk2	kTune

	; generate tones
	asig oscili p5, p4*kTune
	aref oscili p5, p4

	; combine detuned tone and reference tone
	; creates a beat effect from the detune
	asig=(asig+aref)*.5

	outs asig, asig
endin
</CsInstruments>
<CsScore>
; run for 60 seconds
f0 60
e
</CsScore>
</CsoundSynthesizer>

See also

MIDI input and Initialization

Credits

New in Csound version 3.47

Thanks goes to Rasmus Ekman for pointing out the correct controller number range.