#include <Filter6581.h>

Inheritance diagram for reSIDfp::Filter6581:

Public Member Functions
int	clock (int voice1, int voice2, int voice3)

void	input (int sample)

void	updatedCenterFrequency ()

void	updatedResonance ()

void	updatedMixing ()

void	setFilterCurve (double curvePosition)

Public Member Functions inherited from reSIDfp::Filter
void	enable (bool enable)

void	setClockFrequency (double clock)

void	reset ()

void	writeFC_LO (unsigned char fc_lo)

void	writeFC_HI (unsigned char fc_hi)

void	writeRES_FILT (unsigned char res_filt)

void	writeMODE_VOL (unsigned char mode_vol)

Additional Inherited Members
Protected Attributes inherited from reSIDfp::Filter
double	clockFrequency

int	fc

int	res

int	vol

bool	filt1

bool	filt2

bool	filt3

bool	filtE

bool	voice3off

bool	hp

bool	bp

bool	lp

Detailed Description

Filter based on Dag Lem's 6581 filter from reSID 1.0 prerelease. See original source for discussion about theory of operation.

Java port by Antti S. Lankila

Member Function Documentation

RESID_INLINE int reSIDfp::Filter6581::clock	(	int	v1,
		int	v2,
		int	v3
	)

virtual

SID clocking - 1 cycle

Parameters

void reSIDfp::Filter6581::setFilterCurve ( double curvePosition )

Set filter curve type based on single parameter.

Parameters

curvePosition 0 .. 1, where 0 sets center frequency high ("light") and 1 sets it low ("dark")

void reSIDfp::Filter6581::updatedCenterFrequency ( )

virtual

Switch to new distortion curve.

void reSIDfp::Filter6581::updatedMixing ( )

virtual

Mixing configuration modified (offsets change)

void reSIDfp::Filter6581::updatedResonance ( )

inlinevirtual

Resonance tuned by ear, based on a few observations:

there's a small notch even in allpass mode - size of resonance hump is about 8 dB

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