mac
Multiplies and accumulates a- and k-rate signals.
Syntax
ares mac ksig1, asig1 [, ksig2] [, asig2] [, ksig3] [, asig3] [...]
ksig1, etc. -- k-rate input signals
asig1, etc. -- a-rate input signals
mac multiplies and accumulates a- and k-rate signals. It is equivalent to:
ares = asig1*ksig1 + asig2*ksig2 + asig3*ksig3 + ...
Examples
Here is an example of the mac opcode. It uses the file mac.csd. It is written for *NIX systems, and will generate errors on Windows.
| Example of the mac 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
klmid = p5 ;low gain2
kmidh = p6 ;high gain1
khigh = p7 ;high gain2
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 mac klow, alow1, klmid, almid, kmidh, amidh, khigh, 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
; 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