#include <Filter8580.h>

Inheritance diagram for reSIDfp::Filter8580:

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

void	updatedCenterFrequency ()

void	updatedResonance ()

void	input (int input)

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 for 8580 chip based on simple linear approximation of the FC control.

This is like the original reSID filter except the phase of BP output has been inverted. I saw samplings on the internet that indicated it would genuinely happen like this.