stix

stix — Semi-physical model of a stick sound.

Description

stix is a semi-physical model of a stick sound. It is one of the PhISEM percussion opcodes. PhISEM (Physically Informed Stochastic Event Modeling) is an algorithmic approach for simulating collisions of multiple independent sound producing objects.

Syntax

ares stix iamp, idettack [, inum] [, idamp] [, imaxshake]

Initialization

iamp -- Amplitude of output. Note: As these instruments are stochastic, this is only a approximation.

idettack -- period of time over which all sound is stopped

inum (optional) -- The number of beads, teeth, bells, timbrels, etc. If zero, the default value is 30.

idamp (optional) -- the damping factor, as part of this equation:

damping_amount = 0.998 + (idamp * 0.002)

The default damping_amount is 0.998 which means that the default value of idamp is 0. The maximum damping_amount is 1.0 (no damping). This means the maximum value for idamp is 1.0.

The recommended range for idamp is usually below 75% of the maximum value.

imaxshake (optional) -- amount of energy to add back into the system. The value should be in range 0 to 1.

Examples

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

Example 816. Example of the stix 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      ;;;realtime audio out
;-iadc    ;;;uncomment -iadc if realtime audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o stix.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

instr 1

idamp = p4			;vary damping amount
asig stix .5, 0.01, 30, idamp
     outs asig, asig

endin
</CsInstruments>
<CsScore>

i1 0 1 .3
i1 + 1  >
i1 + 1  >
i1 + 1 .95

e
</CsScore>
</CsoundSynthesizer>


See Also

cabasa, crunch, sandpaper, sekere

Credits

Author: Perry Cook, part of the PhOLIES (Physically-Oriented Library of Imitated Environmental Sounds)
Adapted by John ffitch
University of Bath, Codemist Ltd.
Bath, UK

New in Csound version 4.07

Added notes by Rasmus Ekman on May 2002.