STKModalBar — STKModalBar is a resonant bar instrument.


Plugin opcode in stkopd. This opcode is part of the plugin repository and has to be installed separately. The plugin repository can be found here:

This opcode is a resonant bar instrument.It has a number of different struck bar instruments.


asignal STKModalBar ifrequency, iamplitude, [khard, kv1[, kpos, kv2[, klfo, kv3[, klfodepth, kv4[, kmix, kv5[, kvol, kv6[, kinstr, kv7]]]]]]]


ifrequency -- Frequency of note played, in Hertz.

iamplitude -- Amplitude of note played (range 0-1).


khard -- controller 2, hardness of the stick. Value range of kv1 is 0-127.

kpos -- controller 4, stick position. Value range of kv2 is 0-127.

klfo -- controller 11, speed of low-frequency oscillator. Value range of kv3 is 0-127.

klfodepth -- controller 1, depth of low-frequency oscillator. Value range of kv4 is 0-127.

kmix -- controller 8, direct stick mix. Value range of kv5 is 0-127.

kvol -- controller 128, volume. Value range of kv6 is 0-127.

kinstr -- controller 16, instrument presets (0 = marimba, 1 = vibraphone, 2 = agogo, 3 = wood1, 4 = reso, 5 = wood2, 6 = beats, 7 = two fixed, 8 = clump). Value range of kv7 is 0-16.

[Note] Note

The code for this opcode is taken directly from the ModalBar class in the Synthesis Toolkit in C++ by Perry R. Cook and Gary P. Scavone. More on the STK classes can be found here:

kc1, kv1, kc2, kv2, kc3, kv3, kc4, kv4, kc5, kv5, kc6, kv6, kc7, kv7, kc8, kv8 -- Up to 8 optional k-rate controller pairs for the STK opcodes. Each controller pair consists of a controller number (kc) followed by a controller value (kv). Both the controller numbers and the controller values are krate variables. However, during a performance, normally the controller numbers stay fixed while the corresponding controller values may change at any time. The order of the controller pair is arbitrary, as long as they are after iamplitude. Also, it is not needed that all controller pairs are used.


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

Example 1045. Example of the STKModalBar opcode.

; Select audio/midi flags here according to platform
-odac     ;;;RT audio out
;-iadc    ;;;uncomment -iadc if RT audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o STKModalBar.wav -W ;;; for file output any platform

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

instr 1

ifrq	=	p4
kv1	=	p5					;stick hardness					;

asig	STKModalBar cpspch(ifrq), 1, 2, kv1, 4, 120, 11, 0, 1, 0, 8, 10, 16, 1
asig	=	asig * 3				;amplify
	outs asig, asig


i 1 0 2 8.00 0 
i 1 + 2 8.05 120

See also

STK Opcodes


Author: Michael Gogins (after Georg Essl)
Irreducible Productions
New York, NY

New in Csound version 5.11