loopsegp
Prev | Orchestra Opcodes and Operators | Next

## loopsegp

loopsegp — Control signals based on linear segments.

## Description

Generate control signal consisiting of linear segments delimited by two or more specified points. The entire envelope can be looped at time-variant rate. Each segment coordinate can also be varied at k-rate.

## Syntax

    ksig loopsegp  kphase, kvalue0, kdur0, kvalue1 \
          [, kdur1, ... , kdurN-1, kvalueN]

## Performance

ksig - output signal

kphase - point of the sequence read, expressed as a fraction of a cycle (0 to 1)

kvalue0 ...kvalueN - values of points

kdur0 ...kdurN-1 - duration of points expessed in fraction of a cycle

loopsegp opcode is similar to loopseg; the only difference is that, instead of frequency, a time-variant phase is required. If you use phasor to get the phase value, you will have a behaviour identical to loopseg, but interesting results can be achieved when using phases having non-linear motions, making loopsegp more powerful and general than loopseg.

## Examples

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

Example 406. Example of the loopsegp opcode.

    <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 loopsegp.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>
    sr=44100
    ksmps=1
    nchnls=2

    ; By Mark Van Peteghem 2008

       instr 1
    iphase  = p4

    kenv      linen 1, 0.1, p3, 0.1
    kph_amp   phasor 2, 0
    kamp      loopsegp kph_amp, 60, 1, 30, 1, 60
    kamp    = ampdb(kamp)*kenv

    kph_freq  phasor 2, iphase
    klow_freq line 200, p3, 100
    kfreq     loopsegp kph_freq, 400, 1, klow_freq, 1, 400

    asig      vco2 kamp, kfreq, 2, 0.5

             outs asig, asig

       endin

    </CsInstruments>
    <CsScore>
    i1 0 3 0
    i1 + . 0.50
    </CsScore>
    </CsoundSynthesizer>

## Credits

Written by Gabriel Maldonado.

New in Csound 5. (Previously available only on CsoundAV)

Prev | Up | Next
loopseg | Home | looptseg