wguide2 — A model of beaten plate consisting of two parallel delay-lines and two first-order lowpass filters.
A model of beaten plate consisting of two parallel delay-lines and two first-order lowpass filters.
asig -- the input of excitation noise
xfreq1, xfreq2 -- the frequency (i.e. the inverse of delay time) Changed to x-rate in Csound version 3.59.
kcutoff1, kcutoff2 -- the filter cutoff frequency in Hz.
kfeedback1, kfeedback2 -- the feedback factor
wguide2 is a model of beaten plate consisting of two parallel delay-lines and two first-order lowpass filters. The two feedback lines are mixed and sent to the delay again each cycle.
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.
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As a rule of thumb, to avoid making wguide2 unstable, the sum of the two feedback values should be below 0.5. |
Here is an example of the wguide2 opcode. It uses the file wguide2.csd.
Example 526. 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 No messages -odac -iadc -d ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o wguide1.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 nchnls = 2 instr 1 afrq line 50, 10, 100 asig oscil 3000, afrq, 1 aenv expon 1,10,0.000001 aexc = aenv*asig ares wguide2 aexc, 500, 1200, 777, 1500, 0.2, 0.25 out ares,asig endin </CsInstruments> <CsScore> f1 0 4096 10 1 i1 0 3 e </CsScore> </CsoundSynthesizer>