maca
Multiply and accumulate a-rate signals only.
Syntax
ares maca asig1 , asig2 [, asig3] [, asig4] [, asig5] [...]
asig1, asig2, ... -- a-rate input signals
maca multiplies and accumulates a-rate signals only. It is equivalent to:
ares = asig1*asig2 + asig3*asig4 + asig5*asig6 + ...
Examples
Here is an example of the maca opcode. It uses the file maca.csd. It is written for *NIX systems, and will generate errors on Windows.
| Example of the maca opcode. |
|---|
| <CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
-odac ;;;realtime audio out
;-iadc ;;;uncomment -iadc if real audio input is needed too
; For Non-realtime ouput leave only the line below:
; -o mac.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
nchnls = 2
0dbfs = 1
instr 1 ;4 band equalizer
klow = p4 ;low gain1
aenv1 oscil 0.2, 1, 4
aenv1 = aenv1 + klow
klmid = p5 ;low gain2
aenv2 oscil 0.21, 1.1, 4
aenv2 = aenv2 + klmid
kmidh = p6 ;high gain1
aenv3 oscil 0.19, 1.2, 4
aenv3 = aenv3 + kmidh
khigh = p7 ;high gain2
aenv4 oscil 0.18, 1.3, 4
aenv4 = aenv4 + khigh
ifn = p8 ;table
ilc1 table 0, ifn ;low freqency range
ilc2 table 1, ifn ;low-mid
ihc1 table 2, ifn ;mid-high
ihc2 table 3, ifn ;high
asig diskin2 "fox.wav", 1
alow1 butterlp asig, ilc1 ;lowpass 1
almid butterlp asig, ilc2 ;lowpass 2
amidh butterhp asig, ihc1 ;highpass 1
ahigh butterhp asig, ihc2 ;highpass 2
aout maca aenv1, alow1, aenv2, almid, aenv3, amidh, aenv4, ahigh
outs aout, aout
endin
</CsInstruments>
<CsScore>
f1 0 4 -2 150 300 600 5000
f2 0 4 -2 75 500 1000 10000
f3 0 4 -2 200 700 1500 3000
f4 0 4096 10 1
; low lowmid midhigh high table
i 1 0 2.8 2 1 1 1 1
i 1 3 2.8 2 3 1 1 2
i 1 6 2.8 2 1 2 3 3
e
</CsScore>
</CsoundSynthesizer>
|
See also
Opcode Equivalents of Functions
Credits
Author: John ffitch
University of Bath, Codemist, Ltd.
Bath, UK
May 1999
New in Csound version 3.54