## void FlTrapezoid | ## (float low_zero, float low_one, float high_one, |

Builds a Trapezoidal time domain filter using the given parameters.

Builds a Trapezoidal time domain filter using the given parameters.

**Parameters:****low_zero**- the 0 intercept in frequency space.**low_one**- the frequency are which the filter reaches 1.**high_one**- the frequency at which the filter starts decreasing.**high_zero**- the 0 intercept of the right hand side of the filter in frequency space.**si**- the sample rate in seconds.**nsamp**- the number of samples.**filter**- [] the filter produced, which is in time space.**Returns:**- none.

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