Description

Sums the magnitudes across all channels of the spectrum.

Syntax

ksum specsum wsig [, interp]

Initialization

interp (optional, default-0) -- if non-zero, interpolate the output signal (koct or ksum). The default value is 0 (repeat the signal value between changes).

Performance

ksum -- the output signal.

wsig -- the input spectrum.

Sums the magnitudes across all channels of the spectrum. At each new frame of wsig, the magnitudes are summed and released as a scalar ksum signal. Between frames, the output is either repeated or interpolated at the k-rate. This unit produces a k-signal summation of the magnitudes present in the spectral data, and is thereby a running measure of its moment-to-moment overall strength.

Examples

  ksum     specsum   wsig, 1              ; sum the spec bins, and ksmooth
           if ksum < 2000 kgoto zero      ; if sufficient amplitude
  koct     specptrk  wsig                 ;    pitch-track the signal
           kgoto     contin
zero: 
  koct     =         0                    ; else output zero
contin:

See Also

specdisp