This implements an exponential decay window that applies principles described here:
http://en.wikipedia.org/wiki/Exponential_decay

This window is intended for microsound applications as described by Roads (2001 p 88-90). More...

#include <TTExpodecWindow.h>

Inheritance diagram for ExpodecWindow:

Collaboration diagram for ExpodecWindow:

Protected Member Functions
TTErr	calculateValue (const TTFloat64 &x, TTFloat64 &y, TTPtrSizedInt data)
	Calculate y = f(x) for a single value. More...

TTErr	processAudio (TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
	A standard audio processing method as used by TTBlue objects. More...

Protected Attributes
TTFloat64	mRatio
	ratio expresses where to place the loudest sample 0 <= ratio <= 1., 0 = no attack, 1 = no release

Detailed Description

This implements an exponential decay window that applies principles described here:
http://en.wikipedia.org/wiki/Exponential_decay

This window is intended for microsound applications as described by Roads (2001 p 88-90).

Ratio variable allows this single class to produce BOTH expodec and rexpodec windows with options between. Lambda variable is set so that the quietest point in the decay will be -60 dB.
Where 0. <= x <= 1. and 0. <= mRatio <= 1.:
y = e^ ( ( 1 - ( x / mRatio ) ) * lambda ) : for the attack (approaching peak)
= e^ ( ((x - mRatio) / (1 - mRatio)) * lambda ) : for the release (leaving peak)

Definition at line 43 of file TTExpodecWindow.h.

Member Function Documentation

TTErr ExpodecWindow::calculateValue	(	const TTFloat64 &	x,
		TTFloat64 &	y,
		TTPtrSizedInt	data
	)

inlineprotected

Calculate y = f(x) for a single value.

Parameters

x	The input value to the window function.
y	The resulting value for the window function.
data	Not used.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 53 of file TTExpodecWindow.cpp.

References kTTErrNone, and mRatio.

Referenced by processAudio().

TTErr ExpodecWindow::processAudio	(	TTAudioSignalArrayPtr	inputs,
		TTAudioSignalArrayPtr	outputs
	)

protected

A standard audio processing method as used by TTBlue objects.

Parameters

inputs	The input vector that is to be processed.
outputs	The resulting windowed vector.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 74 of file TTExpodecWindow.cpp.

References calculateValue().

Here is the call graph for this function:

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

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation