Detailed Description

An anti-aliasing filter.

This module wraps around other modules duplicating their inputs and providing a single output named "signal". The module works by running at twice the normal sample rate and using a biquad filter to filter out frequencies lower than half the sample rate. For example, to use it with a raw sawtooth oscillator, which is notorious for producing aliased frequencies, you would do

Saw raw_saw("raw");
AntiAlias saw(raw_saw);
Container container;
Audio audio;
container.connect(saw, "signal", audio, "left");

Note that you should add the AntiAlias Module to whatever container you you building and not the underlying module. If you add both, you're underlying module will be updated twice per timestep.

Parameters

[in]	*	all parameters of underlying module
[out]	signal	the anti-aliased output of the underlying module

Public Member Functions
	AntiAlias (Module &m)

void	init ()

void	update ()

void	set (double frequency, double resonance)

Public Member Functions inherited from yase::Module
virtual void	init ()=0

virtual void	update ()=0

int	add_input (string name)

int	add_output (string name)

int	get_input_index (string name) const

string	get_input_name (int index) const

string	get_output_name (int index) const

int	get_output_index (string name) const

void	set_input (string name, double value)

void	set_input (int index, double value)

double	get_input (int index) const

double	get_input (string name) const

double	get_output (string name) const

double	get_output (int index) const

void	set_output (int index, double value)

void	copy_inputs (const Module &source)

void	copy_outputs (Module &destination) const

void	configure (std::vector< std::tuple< string, double > > assignments)

int	num_inputs () const

int	num_outputs () const

void	emit (Event e)

void	set_ts (double s)

double	get_ts ()

Constructor & Destructor Documentation

◆ AntiAlias()

yase::AntiAlias::AntiAlias ( Module & m )

Construct an anti-aliased version the Module m. All inputs of m will be available to the resulting Module. The Module m must provide an output named "signal" which will be availabled to the resulting anti-aliased Module.

Parameters

m	A Module to be anti-aliased

Member Function Documentation

◆ init()

void yase::AntiAlias::init ( )

virtual

This method should be overridden by derived classes. It will usually be called once, after all modules and connections objects have been added to a synthesizer, but before the synthesizer starts running.

Implements yase::Module.

◆ update()

void yase::AntiAlias::update ( )