lposcilsa

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

Syntax

ModernClassic

ar1, ar2 = lposcilsa(aamp, kfreqratio, kloop, kend, ift [,iphs])

ar1, ar2 lposcilsa aamp, kfreqratio, kloop, kend, ift [,iphs]

Initialization

ift -- function table number

iphs -- initial phase (in samples)

Performance

ar1, ar2 -- 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)

lposcilsa is the same as lposcila, but works with stereo files loaded with GEN01.

Examples

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

; additions by Menno Knevel 2022

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

instr 1

kcps  = 1.3                                     ;a 3th up
kloop = 0                                       ;loop start time in samples
kend  = p4                                      ;loop end time in samples

aenv expsega 0.01, 0.1, .8, 1, .3, 1.1, .42     ;envelope with fast and short segment
aL, aR lposcilsa aenv, kcps, kloop, kend, 1     ;use it for amplitude
     outs aL, aR

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

i 1 0 5 45000
i 1 6 3 15000
e
</CsScore>
</CsoundSynthesizer>

See also

Sample Playback

Credits

Author: Gabriel Maldonado

New in version 5.06