c2r — Real to complex format conversion.
Converts a complex-valued input array into a real-valued array, by removing its imaginary part. The output array will be halt the size of the input. This is a utility operation to facilitate complex-valued operations where the result is purely real.
kout[] -- output array containing the real-valued output. It will be created if it does not exist.
kin[] -- input array containing the complex-valued real-imaginary input.
Here is an example of the c2r opcode. It uses the file c2r.csd.
Example 99. Example of the c2r 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 = 64 instr 1 ifftsize = 1024 kcnt init 0 kIn[] init ifftsize kOut[] init ifftsize a1 oscili 0dbfs/2, 440 if kcnt >= ifftsize then kCmplx[] r2c kIn kSpec[] fft kCmplx kCmplx ifft kSpec kOut c2r kCmplx kcnt = 0 endif kIn[] shiftin a1 a2 shiftout kOut kcnt += ksmps out a2 endin </CsInstruments> <CsScore> i1 0 10 </CsScore> </CsoundSynthesizer>