pvscross
pvscross — Performs cross-synthesis between two source fsigs.
Performance
The operation of this opcode is identical to that of pvcross (q.v.), except in using fsigs rather than analysis files, and the absence of spectral envelope preservation. The amplitudes from fsrc and fdest (using scale factors kamp1 for fsrc and kamp2 for fdest) are applied to the frequencies of fsrc. kamp1 and kamp2 must not exceed the range 0 to 1.
With this opcode, cross-synthesis can be performed on real-time audio input, by using pvsanal to generate fsrc and fdest. These must have the same format.
![[Warning]](images/warning.png)
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Warning |
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It is unsafe to use the same f-variable for both input and output of pvs opcodes. Using the same one might lead to undefined behavior on some opcodes. Use a different one on the left and right sides of the opcode. |
Examples
Here is an example of the use of the pvscross opcode. It uses the file pvscross.csd.
Example 685. Example of the pvscross opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer> <CsOptions> -odac </CsOptions> <CsInstruments> sr = 44100 ksmps = 16 nchnls = 1 0dbfs = 1 ;; example written by joachim heintz 2009 instr 1 ipermut = p4; 1 = change order of soundfiles ifftsize = 1024 ioverlap = ifftsize / 4 iwinsize = ifftsize iwinshape = 1; von-Hann window Sfile1 = "fox.wav" Sfile2 = "wave.wav" ain1 soundin Sfile1 ain2 soundin Sfile2 fftin1 pvsanal ain1, ifftsize, ioverlap, iwinsize, iwinshape; fft-analysis of file 1 fftin2 pvsanal ain2, ifftsize, ioverlap, iwinsize, iwinshape; fft-analysis of file 2 ktrans linseg 0, p3, 1; linear transition if ipermut == 1 then fcross pvscross fftin2, fftin1, ktrans, 1-ktrans else fcross pvscross fftin1, fftin2, ktrans, 1-ktrans endif aout pvsynth fcross out aout endin </CsInstruments> <CsScore> i 1 0 2.757 0; frequencies from fox. wav; amplitudes moving from wave to fox i 1 3 2.757 1; frequencies from wave.wav, amplitudes moving from fox to wave e </CsScore> </CsoundSynthesizer>