Flanger Speed and Excursion
As mentioned above, the delay-line length in a digital flanger
is typically modulated by a low-frequency oscillator (LFO).
The oscillator waveform is usually triangular, sinusoidal, or
exponential (triangular on a log-frequency scale). In the sinusoidal
case, we have the following delay variation:
![$\displaystyle M(n) = M_0 \cdot \left[1 + A\sin(2\pi f n T)\right]
$](http://www.dsprelated.com/josimages_new/pasp/img1239.png)



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Flanger Depth Control
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Summary of Windowed Sinc Interpolation