CSine< Tv, Ts > Class Template Reference

Complex sinusoid oscillator. More...

#include <Oscillator.h>

Inherits Ts.

List of all members.

Public Member Functions
	CSine (Tv frq=440, Tv amp=1, Tv dcy=-1, Tv phs=0)
void	amp (Tv val)
	Set amplitude.
void	decay (Tv val)
	Set number of units to decay -60 dB. Negative = no decay.
void	freq (Tv val)
	Set frequency.
void	phase (Tv radians)
	Set phase.
void	reset ()
	Resets amplitude and sets phase to 0.
complex	operator() ()
	Iterate and return current complex output.
Tv	freq ()
	Return frequency.
Public Attributes
complex	val
	Current complex output.

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Detailed Description

template<class Tv = gam::real, class Ts = Synced>
class gam::CSine< Tv, Ts >

Complex sinusoid oscillator.

This oscillator outputs a sine and cosine wave simultaneously. Efficiency wise, it's comparable to a non-interpolating table oscillator, but gives a quadrature (90 degree phase shifted) wave for free. The sinusoids are computed by multiplying two complex numbers to rotate a phasor. This requires only four multiplications and two additions per iteration. The main disadvantage of this oscillator is that it is expensive to change its frequency. This is implemented from Mathews, M., Smith, J. 2003. "Methods for synthesizing very high Q parametrically well behaved two pole filters."

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Constructor & Destructor Documentation

CSine	(	Tv	frq = 440,
		Tv	amp = 1,
		Tv	dcy = -1,
		Tv	phs = 0
	)

Parameters:

[in]	frq	Frequency
[in]	amp	Amplitude
[in]	dcy	Decay time (negative means no decay)
[in]	phs	Phase in [0, 1)

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

• /Users/ljp/code/gamma/trunk/Gamma/Oscillator.h