!= — Determines if one value is not equal to another.
In the above conditional, a and b are first compared. If the indicated relation is true (a not equal to b), then the conditional expression has the value of v1; if the relation is false, the expression has the value of v2.
NB.: If v1 or v2 are expressions, these will be evaluated before the conditional is determined.
In terms of binding strength, all conditional operators (i.e. the relational operators (<, etc.), and ?, and : ) are weaker than the arithmetic and logical operators (+, -, *, /, && and ||).
These are operators not opcodes. Therefore, they can be used within orchestra statements, but do not form complete statements themselves.
Here is an example of the != operator. It uses the file notequal.csd.
Example 13. Example of the != operator.
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 realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o notequal.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ipch = cpspch(p4) iprint = p5 if (iprint != 1) igoto skipPrint print ipch asig vco2 .7, ipch outs asig, asig skipPrint: endin </CsInstruments> <CsScore> f 1 0 65536 10 1 ;sine wave i1 0 .5 8.00 0 i1 0 .5 8.01 1 ; this note will print it's ipch value and only this one will be played i1 0 .5 8.02 2 e </CsScore> </CsoundSynthesizer>
Its output should include lines like this:
instr 1: ipch = 277.167