oscils
Prev | Orchestra Opcodes and Operators | Next

## oscils

oscils — A simple, fast sine oscillator

## Description

Simple, fast sine oscillator, that uses only one multiply, and two add operations to generate one sample of output, and does not require a function table.

## Syntax

    ares oscils iamp, icps, iphs [, iflg]

## Initialization

iamp -- output amplitude.

icps -- frequency in Hz (may be zero or negative, however the absolute value must be less than sr/2).

iphs -- start phase between 0 and 1.

iflg -- sum of the following values:

- 2: use double precision even if Csound was compiled to use floats. This improves quality (especially in the case of long performance time), but may be up to twice as slow.

- 1: skip initialization.

## Performance

ares -- audio output

## Examples

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

Example 559. Example of the oscils 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 oscils.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

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

    instr 1

    iflg = p4
    asig oscils .7, 220, 0, iflg
         outs asig, asig

    endin
    </CsInstruments>
    <CsScore>

    i 1 0 2 0
    i 1 3 2 2	;double precision
    e
    </CsScore>
    </CsoundSynthesizer>

## Credits

Author: Istvan Varga
January 2002

New in version 4.18

Prev | Up | Next
osciln | Home | oscilx