wgbow — Creates a tone similar to a bowed string.
Audio output is a tone similar to a bowed string, using a physical model developed from Perry Cook, but re-coded for Csound.
ifn -- optional table of shape of vibrato, defaults to a sine table.
iminfreq (optional) -- lowest frequency at which the instrument will play. If it is omitted it is taken to be the same as the initial kfreq. If iminfreq is negative, initialization will be skipped.
A note is played on a string-like instrument, with the arguments as below.
kamp -- amplitude of note.
kfreq -- frequency of note played.
kpres -- a parameter controlling the pressure of the bow on the string. Values should be about 3. The useful range is approximately 1 to 5.
krat -- the position of the bow along the string. Usual playing is about 0.127236. The suggested range is 0.025 to 0.23.
kvibf -- frequency of vibrato in Hertz. Suggested range is 0 to 12
kvamp -- amplitude of the vibrato
Here is an example of the wgbow opcode. Play wgbow.csd
Example 1214. Example of the wgbow 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 RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o wgbow.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 kpres = p4 ;pressure value krat = p5 ;position along string kvibf = 6.12723 kvib linseg 0, 0.5, 0, 1, 1, p3-0.5, 1 ; amplitude envelope for the vibrato. kvamp = kvib * 0.01 asig wgbow .7, 55, kpres, krat, kvibf, kvamp, 1 outs asig, asig endin </CsInstruments> <CsScore> f 1 0 2048 10 1 ;sine wave i 1 0 3 3 0.127236 i 1 + 3 5 0.127236 i 1 + 3 5 0.23 e </CsScore> </CsoundSynthesizer>