sin

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.

<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