### Fractional Delay Filters

In*fractional-delay filtering*applications, the interpolator typically slides forward through time to produce a time series of interpolated values, thereby implementing a non-integer signal delay:

*delay line*in order to implement an

*interpolated delay line*(§4.1) that effectively provides a continuously variable delay for discrete-time signals. The

*frequency response*[449] of the fractional-delay FIR filter is

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