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Signal Modifiers: Waveguides

wguide1, wguide2

  ar      wguide1    asig, xfreq, xcutoff, kfeedback
  ar      wguide2    asig, xfreq1, xfreq2, kcutoff1, kcutoff2, kfeedback1, kfeedback2

Description

Simple waveguide blocks

Performance

asig – the input of excitation noise

xfreq – the frequency (i.e. the inverse of delay time) Changed to x-rate in Csound version 3.59.

kcutoff – the filter cutoff frequency in Hz

xcutoff – the filter cutoff frequency in Hz. Changed to x-rate for wguide1 in Csound version 3.59.

kfeedback – the feedback factor

wguide1 is the most elemental waveguide model, consisting of one delayline and one first-order lowpass filter.

wguide2 is a model of beaten plate consisting of two parallel delaylines and two first-order lowpass filters. The two feedback lines are mixed and sent to the delay again each cycle.

Implementing waveguide algoritms as opcodes, instead of as orc instr, allows the user to set kr different than sr, allowing better performance particulary when using real-time.

wguide1
wguide1

wguide2
wguide2

Author

Gabriel Maldonado
Italy
October, 1998 (New in Csound version 3.49)


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Signal Modifiers: Waveguides