rnd
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## rnd

rnd — Returns a random number in a unipolar range at the rate given by the input argument.

## Description

Returns a random number in a unipolar range at the rate given by the input argument.

## Syntax

    rnd(x) (init- or control-rate only)

Where the argument within the parentheses may be an expression. These value converters sample a global random sequence, but do not reference seed. The result can be a term in a further expression.

## Performance

Returns a random number in the unipolar range 0 to x.

## Examples

Here is an example of the rnd opcode. It uses the file rnd.csd.

Example 407. Example of the rnd 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
    ; Audio out   Audio in
    -odac           -iadc    ;;;RT audio I/O
    ; For Non-realtime ouput leave only the line below:
    ; -o rnd.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    ; Initialize the global variables.
    sr = 44100
    kr = 4410
    ksmps = 10
    nchnls = 1

    ; Instrument #1.
    instr 1
      ; Generate a random number from 0 to 1.
      i1 = rnd(1)
      print i1
    endin

    </CsInstruments>
    <CsScore>

    ; Play Instrument #1 for one second.
    i 1 0 1
    ; Play Instrument #1 for one second.
    i 1 1 1
    e

    </CsScore>
    </CsoundSynthesizer>

Its output should be:

    rnd at i-rate: 0.973500   rnd at k-rate: 0.139405
    rnd at i-rate: 0.973500   rnd at k-rate: 0.040065
    rnd at i-rate: 0.973500   rnd at k-rate: 0.412845
    rnd at i-rate: 0.973500   rnd at k-rate: 0.440650
    rnd at i-rate: 0.973500   rnd at k-rate: 0.663581
    rnd at i-rate: 0.973500   rnd at k-rate: 0.876723
    rnd at i-rate: 0.973500   rnd at k-rate: 0.302459
    rnd at i-rate: 0.973500   rnd at k-rate: 0.398580
    rnd at i-rate: 0.973500   rnd at k-rate: 0.448875
    rnd at i-rate: 0.973500   rnd at k-rate: 0.907728

## See Also

birnd

## Credits

Author: Barry L. Vercoe
MIT
Cambridge, Massachussetts
1997

Original Example written by Kevin Conder. Modified by John Harrison.

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