cmplxprod — Complex product of two arrays.
Calculates the complex product of two arrays of the same size and in real-imaginary interleaved format.
kout[] -- output array containing the product. It will be created if it does not exist.
kin1[], kin2[] -- input arrays containing the complex inputs.
Here is an example of the cmplxprod opcode. Play cmplxprod.csd
Example 150. Example of the cmplxprod opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> -d -o dac </CsOptions> <CsInstruments> ;ksmps needs to be an integer div of hopsize ksmps = 64 0dbfs = 1 instr 1 ihopsize = 256 ; hopsize ifftsize = 1024 ; FFT size iolaps = ifftsize/ihopsize ; overlaps ibw = sr/ifftsize ; bin bandwidth kcnt init 0 ; counting vars krow init 0 kOla[] init ifftsize ; overlap-add buffer kIn[] init ifftsize ; input buffer kFil[] init ifftsize ; filter buffer kOut[][] init iolaps, ifftsize ; output buffers kfrst init 1 if kfrst == 1 then copyf2array kFil,1 kfrst = 0 endif a1 diskin2 "fox.wav",1,0,1 ; audio input /* every hopsize samples */ if kcnt == ihopsize then /* window and take FFT */ kWin[] window kIn,krow*ihopsize kSpec[] rfft kWin kProd[] cmplxprod kSpec, kFil /* IFFT + window */ kRow[] rifft kProd kWin window kRow, krow*ihopsize /* place it on out buffer */ kOut setrow kWin, krow /* zero the ola buffer */ kOla = 0 /* overlap-add */ ki = 0 until ki == iolaps do kRow getrow kOut, ki kOla = kOla + kRow ki += 1 od /* update counters */ krow = (krow+1)%iolaps kcnt = 0 endif /* shift audio in/out of buffers */ kIn shiftin a1 a2 shiftout kOla out a2/iolaps /* increment counter */ kcnt += ksmps endin </CsInstruments> <CsScore> f1 0 1024 7 0 64 0.1 64 0.2 128 0.5 256 1 512 1 i1 0 10 </CsScore> </CsoundSynthesizer>