< — Determines if one value is less than another.
In the above conditional, a and b are first compared. If the indicated relation is true (a less than 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 lessthan.csd.
Example 21. 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 <.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 ipch = p4 ipitch = (ipch < 15 ? cpspch(ipch) : ipch) ;if p4 is lower then 15, it assumes p4 to be pitch-class print ipitch ;and not meant to be a frequency in Hertz asig poscil .5, ipitch , 1 outs asig, asig endin </CsInstruments> <CsScore> f1 0 8192 10 1 ;sine wave i1 0 3 8.00 ;pitch class i1 4 3 800 ;frequency e </CsScore> </CsoundSynthesizer>
Its output should include lines like this:
ipitch = 261.626 ipitch = 800.00