STKWurley

STKWurley — STKWurley simulates a Wurlitzer electric piano FM synthesis instrument.

Description

STKWurley simulates a Wurlitzer electric piano FM synthesis instrument. It uses two simple FM Pairs summed together, also referred to as algorithm 5 of the TX81Z.

Syntax

asignal STKWurley ifrequency, iamplitude, [kc1, kv1[, kc2, kv2[, kc3, kv3[, kc4, kv4[, kc5, kv5]]]]]

Initialization

ifrequency -- Frequency of note played, in Hertz.

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

Performance

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). The 5 controller numbers and values that work for STKWurley are:

  • kc, kv -- 2, modulator index 1.

  • kc, kv -- 4, crossfade of outputs.

  • kc, kv -- 11, speed of low-frequency oscillator.

  • kc, kv -- 1, depth of low-frequency oscillator.

  • kc, kv -- 128, ADSR 2 and 4 target.

[Note] Note

The code for this opcode is taken directly from the Wurley class in the Synthesis Toolkit in C++ by Perry R. Cook and Gary P. Scavone. More on the STK classes can be found here: https://ccrma.stanford.edu/software/stk/classes.html

Examples

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

Example 763. Example of the STKWurley opcode.

<CsoundSynthesizer>
<CsOptions>
; 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 STKWurley.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

instr 1

ifrq	=	p4
kndx	line	p5, p3, p6				;(FM) Modulator Index One
kspd	=	p7

asig	STKWurley cpspch(p4), 1, 2,kndx, 4, 10, 11, kspd, 1, 30, 128, 75
	outs asig, asig
endin

</CsInstruments>
<CsScore>

i 1 0 .5 7.00 75  0  20
i 1 + .  8.00 120 0  20
i 1 + 1  6.00 50 120 20
i 1 + 4  8.00 10 10  127
e
</CsScore>
</CsoundSynthesizer>


See Also

STKRhodey.

Credits

Author: Michael Gogins (after Perry Cook)
Irreducible Productions
New York, NY

New in Csound version 5.11