Description

Scales an input spectral datablock with spectral envelopes.

Syntax

wsig specscal wsigin, ifscale, ifthresh

Initialization

ifscale -- scale function table. A function table containing values by which a value's magnitude is rescaled.

ifthresh -- threshold function table. If ifthresh is non-zero, each magnitude is reduced by its corresponding table-value (to not less than zero)

Performance

wsig -- the output spectrum

wsigin -- the input spectra

Scales an input spectral datablock with spectral envelopes. Function tables ifthresh and ifscale are initially sampled across the (logarithmic) frequency space of the input spectrum; then each time a new input spectrum is sensed the sampled values are used to scale each of its magnitude channels as follows: if ifthresh is non-zero, each magnitude is reduced by its corresponding table-value (to not less than zero); then each magnitude is rescaled by the corresponding ifscale value, and the resulting spectrum written to wsig.

Examples

  wsig2    specdiff    wsig1         ; sense onsets
  wsig3    specfilt    wsig2, 2      ; absorb slowly
           specdisp    wsig2, 0.1    ; & display both spectra
           specdisp    wsig3, 0.1

See Also

specaddm, specdiff, specfilt, spechist