loop_gt
loop_gt — Looping constructions.
Initialization
indx -- i-rate variable to count loop.
idecr -- value to decrement the loop.
imin -- minimum value of loop index.
Performance
kndx -- k-rate variable to count loop.
kdecr -- value to decrement the loop.
kmin -- minimum value of loop index.
The actions of loop_gt are equivalent to the code
indx = indx - idecr
if (indx > imin) igoto label
or
kndx = kndx - kdecr
if (kndx > kmin) kgoto label
![[Note]](images/note.png)
|
Note |
|---|---|
| Adviced is to use the 'modern' while or until opcodes for looping constructions. |
Examples
Here is an example of the loop_gt opcode. It uses the file loop_gt.csd.
Example 532. Example of the loop_gt 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 loop_gt.wav -W ;;; for file output any platform ; By Stefano Cucchi - 2021 </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 gisaw ftgen 3, 0, 16384, 10, 0, .2, 0, .4, 0, .6, 0, .8, 0, 1, 0, .8, 0, .6, 0, .4, 0,.2 instr 1 ;master instrument indxFreq = p5 loop: ifreq = p4 + indxFreq print ifreq iamp = 0.5/((p5-p7)/p6) event_i "i", 10, 0, p3, iamp, ifreq loop_gt indxFreq, p6, p7, loop endin instr 10 asig oscili p4, p5, gisaw asig butterhp asig, 50 kdeclick linseg 0, 0.1, 1, p3-0.2, 1, 0.1, 0 outs asig * kdeclick, asig * kdeclick endin </CsInstruments> <CsScore> i1 0 2 200 10 3 1 i1 2 2 200 4 0.3 1 i1 4 2 200 55 7 1 i1 6 2 200 3 0.2 1 e </CsScore> </CsoundSynthesizer>
See also
Program Flow Control: Looping Constructions
More information on this opcode: http://www.csoundjournal.com/2006summer/controlFlow_part2.html written by Steven Yi, and in the Floss Manuals: https://flossmanual.csound.com/csound-language/control-structures