lposcila

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

Syntax

ar lposcila aamp, kfreqratio, kloop, kend, ift [,iphs]

Initialization

ift -- function table number

iphs -- initial phase (in samples)

Performance

ar -- output signal

aamp -- 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)

lposcila is the same as lposcil, but has an audio-rate amplitude argument (instead of k-rate) to allow fast envelope transients.

Examples

Here is an example of the lposcila opcode. It uses the file lposcila.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 lposcila.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

instr 1

kcps  = 1.3                                     ;a 3d up
kloop = 0                                       ;loop start time in samples
kend  = 10000                                   ;loop end time in samples

aenv expsega 0.01, 0.1, 1, 0.1, 0.5, 0.5, 0.01  ;envelope with fast and short segment
asig lposcila aenv, kcps, kloop, kend, 1        ;use it for amplitude
     outs asig*2, asig*2

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

; Play Instrument #1 for 6 seconds.
; This will loop the drum pattern several times.
i 1 0 2

e
</CsScore>
</CsoundSynthesizer>

See also

Sample Playback

Credits

Author: Gabriel Maldonado

New in version 5.06