Windowing functions are used for analysis, and as waveform envelopes, particularly in granular synthesis. Window functions are built in to some opcodes, but others require a function table to generate the window. GEN20 is used for this purpose. The diagram of each window below, is accompanied by the f score statement and ftgen orchestra opcode used to generate it.
Hamming.
Hamming Window Function.
Hanning.
Hanning Window Function
Bartlett.
Bartlett Window Function
Blackman.
Blackman Window Function
Blackman-Harris.
Example F.5. Blackman-Harris window function statement
f85 0 8192 20 5 1
i0 ftgen 85, 0, 8192, 20, 5, 1
Blackman-Harris Window Function
Gaussian.
Example F.7. Gaussian window function statement with extra parameter
f61 0 8192 20 6 1 2
i0 ftgen 61, 0, 8192, 20, 6, 1, 2
Gaussian Window Function
Kaiser.
Example F.8. Kaiser window function statement as default (alpha=0)
f87 0 8192 20 7 1
i0 ftgen 87, 0, 8192, 20, 7, 1
Example F.9. Kaiser window function statement with alpha=5
f71 0 8192 20 7 1 5
i0 ftgen 71, 0, 8192, 20, 7, 1, 5
Example F.10. Kaiser window function statement with alpha=10
f72 0 8192 20 7 1 10
i0 ftgen 72, 0, 8192, 20, 7, 1, 10
Kaiser Window Function
Rectangle.
Example F.11. Rectangle window function statement
f88 0 8192 -20 8 .3
i0 ftgen 88, 0, 8192, -20, 8, .3
Rectangle Window Function
Sinc.
Example F.12. Sinc window function statement (default and max=0.8)
f89 0 8192 -20 9 .8
i0 ftgen 89, 0, 8192, -20, 9, .8
Example F.13. Sinc window function statement (-3π to +3π and normalized)
f89 0 8192 20 9 1 3
i0 ftgen 89, 0, 8192, 20, 9, 1, 3
Sinc Window Function