lposcil
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## lposcil

lposcil — Read sampled sound from a table with looping and high precision.

## Description

Read sampled sound (mono or stereo) from a table, with looping, and high precision.

## Syntax

    ares lposcil kamp, kfreqratio, kloop, kend, ifn [, iphs]

## Initialization

ifn -- function table number

## Performance

kamp -- amplitude

kfreqratio -- multiply factor of table frequency (for example: 1 = original frequency, 1.5 = a fifth up , .5 = an octave down)

kloop -- start loop point (in samples)

kend -- end loop point (in samples)

lposcil (looping precise oscillator) allows varying at k-rate, the starting and ending point of a sample contained in a table (GEN01). This can be useful when reading a sampled loop of a wavetable, where repeat speed can be varied during the performance.

## Examples

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

Example 531. Example of the lposcil 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 lposcil.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

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

    instr 1

    kcps  = 1.5	; a fifth up
    kloop = 0	; loop start time in samples
    kend  = 45000	; loop end time in samples

    asig lposcil 1, kcps, kloop, kend, 1
         outs asig, asig

    endin
    </CsInstruments>
    <CsScore>
    ; Its table size is deferred,
    ; and format taken from the soundfile header.
    f 1 0 0 1 "beats.wav" 0 0 0

    ; Play Instrument #1 for 6 seconds.
    ; This will loop the drum pattern several times.
    i 1 0 6

    e
    </CsScore>
    </CsoundSynthesizer>

## See Also

lposcil3, lposcila, lposcilsa, lposcilsa2

## Credits

Author: Gabriel Maldonado
Italy

New in Csound version 3.52

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