wguide1
wguide1 — A simple waveguide model consisting of one delay-line and one first-order lowpass filter.
Description
A simple waveguide model consisting of one delay-line and one first-order lowpass filter.
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.
kfeedback -- the feedback factor.
wguide1 is the most elemental waveguide model, consisting of one delay-line and one first-order lowpass filter.
Implementing waveguide algorithms as opcodes, instead of orc instruments, allows the user to set kr different than sr, allowing better performance particulary when using real-time.
wguide1.
Examples
Here is an example of the wguide1 opcode. Play wguide1.csd
Example 1221. Example of the wguide1 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 ; Audio out Audio in -odac ;;;RT audio out ; For Non-realtime ouput leave only the line below: ; -o wguide1.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; by Kevin Conder ; additions by Menno Knevel 2021 sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ; Generate some noise. asig noise .5, 0.5 outs asig, asig endin instr 2 asig noise .5, 0.5 ; Generate some noise. kfreq line p4, p3, 100 ; Run it through a wave-guide model. kcutoff init 3000 kfeedback init 0.8 awg1 wguide1 asig, kfreq, kcutoff, kfeedback outs awg1, awg1 endin </CsInstruments> <CsScore> i 1 0 2 ; freq i 2 2 5 2000 ; falling frequency i 2 8 3 100 ; static e </CsScore> </CsoundSynthesizer>