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GEN Routines: Window Functions

GEN20

     
  f  #     time    size    20     window     max     [opt]

Description

This subroutine generates functions of different windows. These windows are usually used for spectrum analysis or for grain envelopes.

Initialization

size – number of points in the table. Must be a power of 2 ( + 1).

window – Type of window to generate:

max – For negative p4 this will be the absolute value at window peak point. If p4 is positive or p4 is negative and p6 is missing the table will be post-rescaled to a maximum value of 1.

opt – Optional argument required by the Kaiser window.

Examples

  f       1       0       1024    20      5

This creates a function which contains a 4 - term Blackman - Harris window with maximum value of 1.

  f       1       0       1024    -20     2       456

This creates a function that contains a Hanning window with a maximum value of 456.

  f       1       0       1024    -20     1

This creates a function that contains a Hamming window with a maximum value of 1.

  f       1       0       1024    20      7       1       2

This creates a function that contains a Kaiser window with a maximum value of 1. The extra argument specifies how "open" the window is, for example a value of 0 results in a rectangular window and a value of 10 in a Hamming like window.

For diagrams, see Window Functions

Paris Smaragdis
MIT, Cambridge
1995

John ffitch
University of Bath/Codemist Ltd.
Bath, UK

New in Csound version 3.2


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GEN Routines: Window Functions