wrap
Wraps-around the signal that exceeds the low and high thresholds.
Syntax
ares wrap asig, klow, khigh
ires wrap isig, ilow, ihigh
kres wrap ksig, klow, khigh
Initialization
isig -- input signal
ilow -- low threshold
ihigh -- high threshold
xsig -- input signal
klow -- low threshold
khigh -- high threshold
wrap wraps-around the signal that exceeds the low and high thresholds.
This opcode is useful in several situations, such as table indexing or for clipping and modeling a-rate, i-rate or k-rate signals. wrap is also useful for wrap-around of table data when the maximum index is not a power of two (see table and tablei). Another use of wrap is in cyclical event repeating, with arbitrary cycle length.
Examples
Here is an example of the wrap opcode. It uses the file wrap.csd.
| Example of the wrap opcode. |
|---|
| <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 wrap.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
0dbfs = 1
nchnls = 2
instr 1 ; Limit / Mirror / Wrap
igain = p4 ;gain
ilevl1 = p5 ; + level
ilevl2 = p6 ; - level
imode = p7 ;1 = limit, 2 = mirror, 3 = wrap
ain soundin "fox.wav"
ain = ain*igain
if imode = 1 goto limit
if imode = 2 goto mirror
asig wrap ain, ilevl2, ilevl1
goto outsignal
limit:
asig limit ain, ilevl2, ilevl1
goto outsignal
mirror:
asig mirror ain, ilevl2, ilevl1
outsignal:
outs asig*.5, asig*.5 ;mind your speakers
endin
</CsInstruments>
<CsScore>
; Gain +Levl -Levl Mode
i1 0 3 4.00 .25 -1.00 1 ;limit
i1 4 3 4.00 .25 -1.00 2 ;mirror
i1 8 3 4.00 .25 -1.00 3 ;wrap
e
</CsScore>
</CsoundSynthesizer>
|
See also
Signal Limiters
Credits
Author: Gabriel Maldonado
Italy
New in Csound version 3.49