hilbert2

hilbert2 — A Hilbert rransformer.

Description

A DFT-based implementation of a Hilbert transformer.

Syntax

ar1, ar2 hilbert2 asig, ifftsize, ihopsize

Initialisation

ifftsize -- DFT analysis size

ihopsize -- analysis hopsize

Performance

asig -- input signal

ar1 -- real output of asig

ar2 -- imag output of asig

hilbert2 is a DFT-based implementation of the Hilbert Transform producing two outputs in quadrature (90 degree phase difference across the spectrum). Unlike the IIR-based hilbert opcode, hilbert2 has a linear frequency response. Given that it employs a streaming algorithm, a delay of fftsize samples will be imposed between input and output.

Example

Here is an example of the hilbert2 opcode. It uses the file hilbert2.csd.

Example 413. Example of the hilbert2 opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

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

instr 1

asig oscili p4, p5
a1,a2 hilbert2 asig,1024,256
  outs a1, a2

endin


</CsInstruments>
<CsScore>
i1 0 10 0.5 440
</CsScore>
</CsoundSynthesizer>


Credits

Author: Victor Lazzarini
2017