wgpluck — A high fidelity simulation of a plucked string.
icps -- frequency of plucked string
iamp -- amplitude of string pluck
iplk -- point along the string, where it is plucked, in the range of 0 to 1. 0 = no pluck
idamp -- damping of the note. This controls the overall decay of the string. The greater the value of idamp, the faster the decay. Negative values will cause an increase in output over time.
ifilt -- control the attenuation of the filter at the bridge. Higher values cause the higher harmonics to decay faster.
kpick -- proportion of the way along the point to sample the output.
axcite -- a signal which excites the string.
A string of frequency icps is plucked with amplitude iamp at point iplk. The decay of the virtual string is controlled by idamp and ifilt which simulate the bridge. The oscillation is sampled at the point kpick, and excited by the signal axcite.
Here is an example of the wgpluck opcode. It uses the file wgpluck.csd.
Example 1219. An example of the wgpluck 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 wgpluck.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> ; by Menno Knevel 2021 sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 icps = 220 iamp = 1 kpick = 0.5 iplk = 0 idamp = p4 ifilt = p5 ichoice = p6 if ichoice == 1 then axcite = 0 ; no exciter signal else axcite diskin2 "fox.wav", 1 ; use the fox as exciter axcite *= .15 ; but lower amplitude endif apluck wgpluck icps, iamp, kpick, iplk, idamp, ifilt, axcite apluck dcblock2 apluck ; gets rid of DC offset outs apluck, apluck endin </CsInstruments> <CsScore> f 1 0 16384 10 1 ; sine wave. s ; damp filter choice i 1 0 8 10 1000 1 i 1 + 8 30 10 1 s i 1 0 8 10 1000 2 i 1 + 8 30 10 2 e </CsScore> </CsoundSynthesizer>