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syn::FirFilter Class Reference

finite impulse response filter. More...

#include <Filter.h>

List of all members.

Public Methods
	FirFilter ()
void	filter (float &sample)
	digital filter. More...
int	order () const
	return the maximum delay, or the order of the filter. More...
void	invert ()
	convert between lowpass to highpass (and viceversa). More...
void	setSimpleLowPass ()
	make this filter a simple lowpass filter. More...
void	setSimpleHighPass ()
	make this filter a simple highpass filter. More...
void	setSimpleBandReject ()
	make this filter a simple bandreject filter. More...
void	setSimpleBandPass ()
	make this filter a simple bandpass filter. More...
void	setCutoff (float fc, float sampRate)
	make this filter low pass, with fc cuttoff frequency. More...

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Detailed Description

finite impulse response filter.

this type of filter is fast but less than ideal (i.e. it is finite). this is a 2nd order filter (can look behind by 2 samples).

See also:

computer music - dodge (chapter on subtractive synthesis).

Todo:

: doesn't work! I don't know why...

Definition at line 32 of file Filter.h.

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Constructor & Destructor Documentation

syn::FirFilter::FirFilter ( ) [inline]

Definition at line 35 of file Filter.h.

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Member Function Documentation

void syn::FirFilter::filter ( float & sample ) [inline]

digital filter. Example (how to use this filter on a buffer of float-type samples) /code for (int x = 0; x < buf.size(); ++x) { f.filter( buf[x] ); } /endcode Definition at line 54 of file Filter.h.

int syn::FirFilter::order ( ) const [inline]

return the maximum delay, or the order of the filter. Definition at line 66 of file Filter.h. Referenced by setCutoff().

void syn::FirFilter::invert ( ) [inline]

convert between lowpass to highpass (and viceversa). Definition at line 70 of file Filter.h.

void syn::FirFilter::setSimpleLowPass ( ) [inline]

make this filter a simple lowpass filter. NOTE: unflexible but fast, useful as a tone control Definition at line 80 of file Filter.h.

void syn::FirFilter::setSimpleHighPass ( ) [inline]

make this filter a simple highpass filter. NOTE: unflexible but fast, useful as a tone control Definition at line 90 of file Filter.h.

void syn::FirFilter::setSimpleBandReject ( ) [inline]

make this filter a simple bandreject filter. NOTE: unflexible but fast, useful as a tone control Definition at line 100 of file Filter.h.

void syn::FirFilter::setSimpleBandPass ( ) [inline]

make this filter a simple bandpass filter. NOTE: unflexible but fast, useful as a tone control Definition at line 110 of file Filter.h.

void syn::FirFilter::setCutoff ( float fc, float sampRate ) [inline]

make this filter low pass, with fc cuttoff frequency. Parameters: fc   Positive value in Herz between 0 and Nyquist frequency (samplingrate / 2). sampRate   sampling rate of your data in hz. See also: bottom of page 203 in "computer music" - charles dodge Definition at line 122 of file Filter.h.

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The documentation for this class was generated from the following file:

• /root/src/subsynth/syn/Util/Filter.h

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