wrap — Wraps-around the signal that exceeds the low and high thresholds.


Wraps-around the signal that exceeds the low and high thresholds.


ares wrap asig, klow, khigh
ires wrap isig, ilow, ihigh
kres wrap ksig, klow, khigh


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.


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

Example 1251. Example of the wrap opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

; 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

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

asig  limit  ain, ilevl2, ilevl1
goto  outsignal

asig  mirror  ain, ilevl2, ilevl1

outs  asig*.5, asig*.5			;mind your speakers


;           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

See also

Signal Limiters


Author: Gabriel Maldonado

New in Csound version 3.49