STKDrummer — STKDrummer is a drum sampling synthesizer.


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:

STKDrummer is a drum sampling synthesizer using raw waves and one-pole filters, The drum rawwave files are sampled at 22050 Hz, but will be appropriately interpolated for other sample rates.


asignal STKDrummer ifrequency, iamplitude


ifrequency -- Samples being played.

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

[Note] Note

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


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

Example 1040. Example of the STKDrummer opcode.

; Select audio/midi flags here according to platform
-odac      -M0  ;;;realtime audio out and midi in
;-iadc    ;;;uncomment -iadc if RT audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o STKDrummer.wav -W ;;; for file output any platform

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

instr 1	;STK Drummer - has no controllers but plays samples (11)

icps	cpsmidi
iamp	ampmidi	1
asig	STKDrummer icps, iamp
	outs asig, asig

; play 5 minutes
f0 300

See also

STK Opcodes


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

New in Csound version 5.11