cepsinv

Calculate the inverse cepstrum of an array.

Syntax

kenv cepsinv keps[]

Performance

keps[] -- the cepstrum input, an array of size N+1, where N is power-of-two, containing the cepstral coefficients.

kenv -- the inverse cepstrum (spectral envelope), an array of N+1 magnitudes.

Examples

Here is an example of the use of the cepsinv opcode. It uses the file cepsinv.csd.

<CsoundSynthesizer>
<CsOptions>
</CsOptions>
<CsInstruments>

instr 1

a1 diskin "fox.wav",1,0,1
k1 randh  80, 2.5
a2 vco2  8, 220+k1
fsig pvsanal a1,1024,256,1024,1
fsig2 pvsanal a2,1024,256,1024,1
keps[] pvsceps fsig,30
kenv[] cepsinv keps
fenv tab2pvs r2c(kenv)
fvoc pvsfilter fsig2, fenv, 1
asig pvsynth fvoc

    out asig
endin


</CsInstruments>
<CsScore>
i1 0 60
</CsScore>
</CsoundSynthesizer>

See Also

Array-based spectral opcodes

Credits

Author: Victor Lazzarini
2014