2 #ifndef WIRECELLSIGPROC_LFFILTER     3 #define WIRECELLSIGPROC_LFFILTER 
virtual const Waveform::realseq_t filter_waveform(int nbins) const 
Provide the filter waveform with a given number of frequency bins. 
LfFilter(double max_freq=1 *units::megahertz, double tau=0.02 *units::megahertz)
virtual WireCell::Configuration default_configuration() const 
Optional, override to return a hard-coded default configuration. 
virtual void configure(const WireCell::Configuration &config)
Accept a configuration. 
Json::Value Configuration
static const double megahertz