mac — Multiplies and accumulates a- and k-rate signals.
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 + ...
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 562. Example of the mac opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<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>