sin
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## sin

sin — Performs a sine function.

## Description

Returns the sine of x (x in radians).

## Syntax

    sin(x) (no rate restriction)

    sin(k/i[]) (k- or i-arrays )

## Examples

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

Example 980. Example of the sin 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 realtime audio input is needed too
    ; For Non-realtime ouput leave only the line below:
    ; -o sin.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    sr = 44100
    ksmps = 32
    nchnls = 2
    0dbfs  = 1

    instr 1

    isin1     =          sin(0) 					;sine of 0 is 0
    isin2     =          sin($M_PI_2) 				;sine of pi/2 (1.5707...) is 1
    isin3     =          sin($M_PI) 				;sine of pi (3.1415...) is 0
    isin4     =          sin($M_PI_2 * 3) 				;sine of 3/2pi (4.7123...) is -1
    isin5     =          sin($M_PI * 2) 				;sine of 2pi (6.2831...) is 0
    isin6     =          sin($M_PI * 4) 				;sine of 4pi is also 0
              print      isin1, isin2, isin3, isin4, isin5, isin6
    endin

    instr 2 ;sin used in panning, after an example from Hans Mikelson

    aout      vco2       0.8, 220 					; sawtooth
    kpan      linseg     p4, p3, p5 ;0 = left, 1 = right
    kpan      =          kpan*$M_PI_2 				;range 0-1 becomes 0-pi/2
    kpanl     =          cos(kpan)
    kpanr     =          sin(kpan)
              outs       aout*kpanl, aout*kpanr
    endin

    </CsInstruments>
    <CsScore>
    i 1 0 0
    i 2 0 5 0 1 ;move left to right
    i 2 5 5 1 0 ;move right to left
    e
    </CsScore>
    </CsoundSynthesizer>

Its output should include a line like this:

    instr 1:  isin1 = 0.000  isin2 = 1.000  isin3 = 0.000  isin4 = -1.000  isin5 = -0.000  isin6 = 0.000

## See also

Trigonometric Functions

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