scanmap — Allows the position and velocity of a node in a scanned process to be read.
Plugin opcode in scansyn.
Allows the position and velocity of a node in a scanned process to be read.
iscan -- which scan process to read
iwhich (optional) -- which node to sense. The default is 0.
kamp -- amount to amplify the kpos value.
kvamp -- amount to amplify the kvel value.
The internal state of a node is read. This includes its position and velocity. They are amplified by the kamp and kvamp values.
Here is an example of the scanmap opcode. It uses the file scanmap.csd.
Example 944. Example of the scanmap 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 ;;;RT audio out ;-iadc ;;;uncomment -iadc for RT audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o scanmap.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr scannode a0 init 0 irate = .001 ; scanu2 init, irate, ifndisplace, ifnmass, ifnmatrix, ifncentr, ifndamp, kmass, ; kmtrxstiff, kcentr, kdamp, ileft, iright, kpos, kdisplace, ain, idisp, id scanu2 1, irate, 6, 2, 3, p5, 5, 2, 9, .01, .01, .1, .9, 0, 0, a0, 0, 2 kpos,kvel scanmap 2, 100,1, p4 ; amplify the kpos value 100 times display kpos, .25 ; display is updated every .25 of a second asig poscil .5+kvel, 150+kpos ; use moving velocity and position of the node outs asig, asig endin </CsInstruments> <CsScore> f1 0 128 10 1 ; Initial displacement condition: sine f2 0 128 -7 1 128 1 ; Masses f3 0 16384 -23 "string-128.matrxB" ; Spring matrices ;------------------------------------- ; 2 different Centering forces f44 0 128 -7 1 128 1 ; uniform initial centering f4 0 128 -7 .001 128 1 ; ramped centering ;------------------------------------- f5 0 128 -7 1 128 1 ; uniform damping f6 0 128 -7 .01 128 .01 ; uniform initial velocity f7 0 128 -5 .001 128 128 ; Trajectory s; node i"scannode" 0 10 0 4 ; uniform initial centering ramped centering i"scannode" 11 10 64 4 ; reading 3 nodes i"scannode" 22 10 127 4 ; 0 - 64 - 127 s; node i"scannode" 0 10 0 44 ; uniform initial centering i"scannode" 11 10 64 44 ; reading 3 nodes i"scannode" 22 10 127 44 ; 0 - 64 - 127 e </CsScore> </CsoundSynthesizer>
Here is another example of the scanmap opcode. It uses the file scanmap_matrxT.csd.
Example 945. Second example of the scanma opcode.
<CsoundSynthesizer> <CsOptions> ; Select audio/midi flags here according to platform ; Audio out Audio in -odac ; -iadc ;;;RT audio I/O ; For Non-realtime ouput leave only the line below: ; -o scanmap_matrxT.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr scanmap_Additive a0 init 0 kp[] init 16 kv[] init 16 giTableKP ftgen 100, 0, -16, 2, 0 giTableKV ftgen 101, 0, -16, 2, 0 scanu2 -1, .1, 6, 2, 3, 4, 5, 2, 10, .001, .01, .1, .9, 0, 0, a0, 1, 2 kp,kv scanmap 2, 1000, 2 copya2ftab kp, giTableKP copya2ftab kv, giTableKV a1 poscil ampdbfs(p4)*kv[8], cpsmidinn(p5)+kp[8] a2 poscil ampdbfs(p4)*kv[13], cpsmidinn(p5)+kp[13] a3 poscil ampdbfs(p4)*kv[5], cpsmidinn(p5)+kp[5] a4 poscil ampdbfs(p4)*kv[1], cpsmidinn(p5)+kp[1] kamp line 3, p3, 0.01 outs (a1+a4)*kamp, (a2+a3) * kamp endin </CsInstruments> <CsScore> f1 0 16 10 1 ; initial displacement condition (sine shape) f2 0 16 -7 1 16 1 ; uniform masses f3 0 0 -44 "string_with_extras-16.matrxT" f4 0 16 -7 .001 16 1 ; ramped centering f5 0 16 -7 .1 16 1 ; ramped damping f6 0 16 -7 .01 16 .01 ; uniform initial velocity i "scanmap_Additive" 0 15 -1 72 e </CsScore> </CsoundSynthesizer>
More information on Scanned Synthesis (as well as several other matrices) is available on the Scanned Synthesis page at cSounds.com.
Also an article on these opcodes: http://www.csounds.com/stevenyi/scanned/yi_scannedSynthesis.html , written by Steven Yi